[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; 94?WL
} u;gO+)wqv
int i1=l; )muNfs m
int i2=mid+1; G %6P`:
for(int cur=l;cur<=r;cur++){ hg(<>_~
if(i1==mid+1) uTxa5j
data[cur]=temp[i2++]; m^G(qoZ]
else if(i2>r) b.@a,:"
data[cur]=temp[i1++]; {VE h@yn
else if(temp[i1] data[cur]=temp[i1++]; z.!N|"4yr
else L_NiU;cr%
data[cur]=temp[i2++]; CMaph
} 52dD(
} ylKK!vRHT
m&Mupl
} +ti ?7|bK<
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改进后的归并排序: b1.*cIv}
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package org.rut.util.algorithm.support; ~DI$O[KpR%
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import org.rut.util.algorithm.SortUtil; UnF8#~
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/** (Z SaAn),
* @author treeroot "|L"C+tE
* @since 2006-2-2 *iEtXv
* @version 1.0 a+E&{pV
*/ Ve3z5d:^
public class ImprovedMergeSort implements SortUtil.Sort { AQlB_@ b
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private static final int THRESHOLD = 10; i(^U<DW$
{P]C>
/* b.&WW
* (non-Javadoc) rtRbr_
* S3E,0%yo+)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &)%+DUV|
*/ H<Oo./8+
public void sort(int[] data) { _*fNa!@hY
int[] temp=new int[data.length]; 8w&-O~M
mergeSort(data,temp,0,data.length-1); UJ)pae
} 2gPqB*H
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private void mergeSort(int[] data, int[] temp, int l, int r) { c+9L6}D
int i, j, k; "6$V1B0KW
int mid = (l + r) / 2; a>'ez0C
if (l == r) @1JwjtNk
return; hj [77EEz
if ((mid - l) >= THRESHOLD) - {QU>`2
mergeSort(data, temp, l, mid); l@4_D;b3o"
else //q(v,D%Q
insertSort(data, l, mid - l + 1); vxOqo)yO
if ((r - mid) > THRESHOLD) &12KpEyf
mergeSort(data, temp, mid + 1, r); _\ToA9m
else sjr,)|#[
insertSort(data, mid + 1, r - mid); ,50
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for (i = l; i <= mid; i++) { &9p!J(C
temp = data; Z<-_Y]4j
} T{k P9 4
for (j = 1; j <= r - mid; j++) { <v:VA!]
temp[r - j + 1] = data[j + mid]; 5ilGWkb`'X
} ?Z7`TnG$uf
int a = temp[l]; r~t`H*C)}
int b = temp[r]; jxh:z
for (i = l, j = r, k = l; k <= r; k++) { 9-KhJq%
if (a < b) { }}AIpYp,P
data[k] = temp[i++]; ,c p2Fac
a = temp; FzT.9Vz7
} else { .f\LzZ-I:
data[k] = temp[j--]; .Pc>1#z&[
b = temp[j]; t4WB^dHYp
} 5p;AON
} 'o>)E>
} M"~jNe|
;b$P*dSG}
/** Dqx#i-L23
* @param data x sryXex;
* @param l I`kfe`_
* @param i 9DxHdpOk
*/ `8:)? 0Ez
private void insertSort(int[] data, int start, int len) { CLR1CGnn7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O VV@
} m[9.'@ye
} : \+xXb{
} >XD?zF)6
} {3~VLdy
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堆排序： uN|A}/hr]
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package org.rut.util.algorithm.support; Bt+^H6cb
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import org.rut.util.algorithm.SortUtil; 7L{1S v
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/** m>@hh#kBg
* @author treeroot AM}R#86
* @since 2006-2-2 )r2Y@+.FN
* @version 1.0 ^X=Q{nB
*/ y+k_&ss
public class HeapSort implements SortUtil.Sort{ !#tVQ2O
&`"DG$N(
/* (non-Javadoc) $*yYmF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *]6g-E?:@
*/ o.+;]i}D
public void sort(int[] data) { Dp@XAyiA[
MaxHeap h=new MaxHeap(); jjs/6sSRk
h.init(data); sVLvnX,
for(int i=0;i h.remove(); 9BCW2@Kp
System.arraycopy(h.queue,1,data,0,data.length); =kjKK
} >rSjP1-F
bjZJP\6
private static class MaxHeap{ 067c/c
_Cmmx`ln
void init(int[] data){ "[bkdL<
this.queue=new int[data.length+1]; L$ZjMJ
for(int i=0;i queue[++size]=data; d>NGCe
fixUp(size); 7FB?t<x
} B VBn.ut
} ]P4WfV d
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private int size=0; Njq}M/{U
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private int[] queue; vwCQvt
rPV Q#iB
public int get() { (I[_}l
return queue[1]; 615Ya<3f8
} ,6)N.
ks405
public void remove() { B=_w9iVN
SortUtil.swap(queue,1,size--); @=-(H<0
fixDown(1); eV;r /4
} th?+TNb^
file://fixdown {15j'Qwm
private void fixDown(int k) { vgfC{]v<W]
int j; 0YH5B5b
while ((j = k << 1) <= size) { twT/uBQ4a
if (j < size %26amp;%26amp; queue[j] j++; !`69.v
if (queue[k]>queue[j]) file://不用交换 N5 ME_)
break; Ltlp9 S
SortUtil.swap(queue,j,k); w:&""'E
k = j; 2M %j-yG"
} W5*ldXXk
} 5{c;I<0
private void fixUp(int k) { @CprC]X
while (k > 1) { aukcO;oG<
int j = k >> 1; tpfgUZ{
if (queue[j]>queue[k]) Z}W{ iD{
break; --yF%tRMP
SortUtil.swap(queue,j,k); h\s/rZg=r
k = j; 2g.lb&3W
} SSK}'LQ
} ?=u?u k<-
)M0YX?5AR
} r`H}f#.KR
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} gf|uZ9{
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SortUtil： |z-f8$
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package org.rut.util.algorithm; 'jev1u[
-Q WvB
import org.rut.util.algorithm.support.BubbleSort; !09)WtsEfx
import org.rut.util.algorithm.support.HeapSort; E^F"$Z"N
import org.rut.util.algorithm.support.ImprovedMergeSort; DfXkLOGik
import org.rut.util.algorithm.support.ImprovedQuickSort; 5`;SI36"
import org.rut.util.algorithm.support.InsertSort; !_QI<=X
import org.rut.util.algorithm.support.MergeSort; f|[7LIdh-
import org.rut.util.algorithm.support.QuickSort; (gt\R}
import org.rut.util.algorithm.support.SelectionSort; Fmk:[hMw
import org.rut.util.algorithm.support.ShellSort; X5 vMY
,jU>V]YC
/** GQ2GcX(E(
* @author treeroot +^.Yt0}
* @since 2006-2-2 umYsO.8
* @version 1.0 ]so/AdT9hA
*/ m`yvZ4K!
public class SortUtil { >m%_`68
public final static int INSERT = 1; y>o:5':;'
public final static int BUBBLE = 2; UXm_-/&b9
public final static int SELECTION = 3; #bOv}1,s
public final static int SHELL = 4; M/3;-g
public final static int QUICK = 5; m+QS -woHn
public final static int IMPROVED_QUICK = 6; #s)f3HU>
public final static int MERGE = 7; Z@~gN5@,M
public final static int IMPROVED_MERGE = 8; Kb~nC6yJc
public final static int HEAP = 9; _4{0He`q
73Dxf -
public static void sort(int[] data) { !:{Qbv&T
sort(data, IMPROVED_QUICK); {K^5q{u
} bz*@[NQ
private static String[] name={ 'L/)9.29
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .N(R~_
}; 7e_4sxg'(3
~ua(Qm
private static Sort[] impl=new Sort[]{ -[mmT'sS
new InsertSort(), +a,SP
new BubbleSort(), QiCia#_
new SelectionSort(), pdu1 kL
new ShellSort(), .K C* (}-
new QuickSort(), Nr|Gw @+
new ImprovedQuickSort(), eI8o#4nT
new MergeSort(), * #yF`_p
new ImprovedMergeSort(), K\xz|Gq
new HeapSort() V@'Xj .ze
}; l@`k:?
di\.*7l?
public static String toString(int algorithm){ }7PJr/IuF
return name[algorithm-1]; Z+xkN
} z)Rkd0/X
%bcf%7
public static void sort(int[] data, int algorithm) { P`tOL#UeZL
impl[algorithm-1].sort(data); H_xHoCLI
} c <TEA
Hav&vV
public static interface Sort { 7qC /a c
public void sort(int[] data); ;qmnG3;Q
} ={g"cx
+17!v_4^
public static void swap(int[] data, int i, int j) { h#1:ypA6l
int temp = data; D+T/ Z)
data = data[j]; =?]`Xo,v~
data[j] = temp; ,Yag! i>;
} RDps{),E;d
} k>i88^kPV