[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; YEqWTB|w
} Djf,#&j!3
int i1=l; o,RLaS,BK'
int i2=mid+1; 2]*2b{gF,
for(int cur=l;cur<=r;cur++){ ffYiu4$m
if(i1==mid+1) ) 4'@=q
data[cur]=temp[i2++]; /1lUFL2D
else if(i2>r) VN8ao0^d;d
data[cur]=temp[i1++]; sxLq'3(
else if(temp[i1] data[cur]=temp[i1++]; !P0Oq)q
else ?wx|n_3<:
data[cur]=temp[i2++]; ]={{$}8.
} bdCpGG9
} etH%E aF[
hw&R.F
} *l^%7Wrk
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改进后的归并排序: qcfLA~y
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package org.rut.util.algorithm.support; up7]Yy;o=
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import org.rut.util.algorithm.SortUtil; <&rvv4*H
YvK8;<k@-?
/** ?79ABm a
* @author treeroot )y:~T\g
* @since 2006-2-2 VscEdtkd
* @version 1.0 uIvE~<
*/ ""ICdZ_A
public class ImprovedMergeSort implements SortUtil.Sort { PZ"=t!
9YpD\H`
private static final int THRESHOLD = 10; 6F3#Rxh
7=8e|$K_
/* ZWSYh>"
* (non-Javadoc) I%whM~M1+
* 3say&|kJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LdAfY0
*/ 70:a2m
public void sort(int[] data) { BUcze\+
int[] temp=new int[data.length]; e;<=aa)}?
mergeSort(data,temp,0,data.length-1); !285=cxz
} GV([gs
X&6p_Lo
private void mergeSort(int[] data, int[] temp, int l, int r) { i1?H*:]
int i, j, k; ;p#)z/zZ
int mid = (l + r) / 2; MI@id
if (l == r) T)]5k3{
return; Pz1pEyuL
if ((mid - l) >= THRESHOLD) MDS;qZx=
mergeSort(data, temp, l, mid); 0>m-J
else Jx@3zl
insertSort(data, l, mid - l + 1); .4~n|d>z
if ((r - mid) > THRESHOLD) \0m[Ch}~ey
mergeSort(data, temp, mid + 1, r); 70L{u+wIy
else </|IgN$w`
insertSort(data, mid + 1, r - mid); *O|Z[>
Llk4=p
for (i = l; i <= mid; i++) { T'l >$6
temp = data; {ls$#a+d
} gfs?H#
for (j = 1; j <= r - mid; j++) { 'kK}9VKl
temp[r - j + 1] = data[j + mid]; Y`3>i,S6\
} wbzAX
int a = temp[l]; wEo/H
int b = temp[r]; %uyRpG3,
for (i = l, j = r, k = l; k <= r; k++) { YZdp/X6x
if (a < b) { ZO+c-!%[(
data[k] = temp[i++]; ]v3 9ag_hu
a = temp; tm(.a?p
} else { Os@ d&wm
data[k] = temp[j--]; Bls\)$
b = temp[j]; %9xz[Ng
} 41WnKz9c
} K<KyX8$P0
} .S17O}
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/** wz5xJ:Tj
* @param data keEyE;O}u
* @param l [MYd15
* @param i eW]K~SPd7
*/ h\b]>q@
private void insertSort(int[] data, int start, int len) { B]q &?~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ym5q#f)|
} { D1.
} T2 0dZ8{y
} ]C-hl}iq
} *?K3jy{
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堆排序： `ej
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package org.rut.util.algorithm.support; v"Fa_+TVx
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import org.rut.util.algorithm.SortUtil; RiF~-;v&
a1Qg&s<
/** Tz1St{s\
* @author treeroot {mMrD 5
* @since 2006-2-2 T&I*8 R~
* @version 1.0 ,Utp6X
*/ 67Z|=B!7
public class HeapSort implements SortUtil.Sort{ 16[>af0<g
0}k[s+^
/* (non-Javadoc) ig]*Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `AeId/A4n
*/ `(<XdlOj
public void sort(int[] data) { u<./ddC
MaxHeap h=new MaxHeap(); 9. Q;J#;1
h.init(data); (t1:2WY@
for(int i=0;i h.remove(); 1"009/|
System.arraycopy(h.queue,1,data,0,data.length); |r!G(an1x4
} *?7Ie;)
DF/p{s1Y3
private static class MaxHeap{ l.?R7f
MVK='
void init(int[] data){ NA>h$N
this.queue=new int[data.length+1]; dy;Ue5
for(int i=0;i queue[++size]=data; C".&m
fixUp(size); ZJ@M}-4O1
} #[C|%uq
} |_8-3
,2/qQD n/
private int size=0; a1B_w#?8
0n|op:]BHM
private int[] queue; bN@V=C3
ZkkXITQkPM
public int get() { @kn0f`
return queue[1]; 5zX;/n~
} /i$E|[
_`|Hk2O
public void remove() { |AW[4Yn>
SortUtil.swap(queue,1,size--); gX5I`mm
fixDown(1); dU\,>3tG
} V6?ku6k
file://fixdown $%"i|KTsv:
private void fixDown(int k) { wj9CL1Gx
int j; qm&}^S
while ((j = k << 1) <= size) { gYfN?A*`_
if (j < size %26amp;%26amp; queue[j] j++; v_"p)4&'
if (queue[k]>queue[j]) file://不用交换 8MGtJ'.
break; {3]g3mj
SortUtil.swap(queue,j,k); hWwh`Vw%
k = j; 1+v&SU
} *<#jr
} 4:=']C
private void fixUp(int k) { h}i /u
while (k > 1) { Pfu2=2Ra
int j = k >> 1; MQY^#N
if (queue[j]>queue[k]) L"A,7@:Vd
break; g8 ,V( ^
SortUtil.swap(queue,j,k); RyKsM.
k = j; kXA o+l
} aErms-~
} 4<)%Esyb
b"t95qlL
} iXK.QktHw
ao#{N=mn
} X90VJb]
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SortUtil： Lnbbv *
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package org.rut.util.algorithm; U0q{8 "Pl
LCx{7bN1ro
import org.rut.util.algorithm.support.BubbleSort; O&Q_vY
import org.rut.util.algorithm.support.HeapSort; :t-a;Q;
import org.rut.util.algorithm.support.ImprovedMergeSort; |gM|>
import org.rut.util.algorithm.support.ImprovedQuickSort; $]Kgs6=r
import org.rut.util.algorithm.support.InsertSort; Ol6jx%Je`
import org.rut.util.algorithm.support.MergeSort; N}b/;Y
import org.rut.util.algorithm.support.QuickSort; YwyP+Sr\
import org.rut.util.algorithm.support.SelectionSort; o8.KakrPP
import org.rut.util.algorithm.support.ShellSort; 0m$f9b|Q?
^AdHP!I
/** O%;H#3kn&s
* @author treeroot %eB0)'
* @since 2006-2-2 y{+$B Y$_
* @version 1.0 S:4'k^E
*/ ,3&XV%1
public class SortUtil { X@|'#%
public final static int INSERT = 1; 2%i_SX[
public final static int BUBBLE = 2; G=/a>{
public final static int SELECTION = 3; a7s+l=
public final static int SHELL = 4; l5QH8eNwME
public final static int QUICK = 5; x7)j?2
public final static int IMPROVED_QUICK = 6; Yb\t0:_
public final static int MERGE = 7; 5drc8_fZ
public final static int IMPROVED_MERGE = 8; htX;"R&
public final static int HEAP = 9; DW&%"$2
CRf!tsj@
public static void sort(int[] data) { F]DRT6)
sort(data, IMPROVED_QUICK); W~(@*H
} 7Vd"k;:X
private static String[] name={ Rd@34"O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kIhP 73M
}; A5cx!h
U>?q|(u
private static Sort[] impl=new Sort[]{ m/RX~,T*v&
new InsertSort(), a~E@scD
new BubbleSort(), Qn'Do4Le
new SelectionSort(), NC'+-P'y
new ShellSort(), 'NHtCs=F
new QuickSort(), nXPl\|pXt
new ImprovedQuickSort(), IV*@}~BJ
new MergeSort(), nf=*KS\v
new ImprovedMergeSort(), XG FjqZr`
new HeapSort() oU`8\n](
}; <"F\&M`G
?3 {&"
public static String toString(int algorithm){ DKw%z8ft|
return name[algorithm-1]; C4wJSQl_I
} )Be?axI
d5h]yIz^
public static void sort(int[] data, int algorithm) { G<n(\85X
impl[algorithm-1].sort(data); A2>rS
} 4j^-n_T
4.il4Qqy}i
public static interface Sort { X^;[X~g
public void sort(int[] data); %;ZWYj`]n
} w/_n$hX
FN jT?*
public static void swap(int[] data, int i, int j) { Cq\1t
int temp = data; !wP|t#Sc9
data = data[j]; =OY&;d!C
data[j] = temp; z{XN1'/V
} &c!d}pU}
} 8axz`2`