[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; F)P"UQ!\
} \z"0lAv"
int i1=l; $U=E7JO
int i2=mid+1; V?"X0>]0
for(int cur=l;cur<=r;cur++){ v"'Co6fw
if(i1==mid+1) `;Qw/xl_N
data[cur]=temp[i2++]; t<S]YA~N'
else if(i2>r) W'2T7ha Es
data[cur]=temp[i1++]; -WiOs;2~/
else if(temp[i1] data[cur]=temp[i1++]; YNV!(>\GE
else py#`
data[cur]=temp[i2++]; nd)Z0%xo
} P&PPX#%
} ]C.x8(2!f
:EOx>Pf_9)
} ~<b/%l>h1
O 1TJJ8
改进后的归并排序: D4 {?f<G0F
"JI FF_
package org.rut.util.algorithm.support; `CCuwe<v
aRFLh
import org.rut.util.algorithm.SortUtil; !]]QbB
;M,u,KH)/
/** C? pi8Xg
* @author treeroot VA4>!t)
* @since 2006-2-2 J[E_n;d1
* @version 1.0 yh9fHN)F
*/ {ctEjgiE
public class ImprovedMergeSort implements SortUtil.Sort { N[e QT
u6&<Bv
private static final int THRESHOLD = 10; r(sQI# P
;A^0="x&
/* jwsl"zL
* (non-Javadoc) 1 o<l;:
* !: e(-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c)H(w
*/ QoZ7l]^
public void sort(int[] data) { -dX{ R_*
int[] temp=new int[data.length]; xs<~[l
mergeSort(data,temp,0,data.length-1); 3#fu;??1.
} 7P3PQ%:
J6x#c`Y
private void mergeSort(int[] data, int[] temp, int l, int r) { yn&AMq ]o
int i, j, k; Z4YQ5O5
int mid = (l + r) / 2; ]3.Un,F
if (l == r) Cj~45)r
return; |$[WnYP
if ((mid - l) >= THRESHOLD) Q`$Q(/
mergeSort(data, temp, l, mid); IT,d(UV_
else ?39B(T
insertSort(data, l, mid - l + 1); _?UW,5=O
if ((r - mid) > THRESHOLD) DG_tmDT4
mergeSort(data, temp, mid + 1, r); ~ou1{NS
else ^qNh)?V?]I
insertSort(data, mid + 1, r - mid); w k1O*_76
!eb}jL
for (i = l; i <= mid; i++) { JTT"t@__
temp = data; C;m7~R
} mKWfRx*UdG
for (j = 1; j <= r - mid; j++) { !3~VoNh,
temp[r - j + 1] = data[j + mid]; +rEqE/QF
} D&1*,`
int a = temp[l]; *"rgK|CM$
int b = temp[r]; OkSJob
for (i = l, j = r, k = l; k <= r; k++) { 3Cq/ o'
if (a < b) { Izrf42 >k
data[k] = temp[i++]; /Mq]WXq[V
a = temp; D>& ;K{!
} else { -fF1vJ7L
data[k] = temp[j--]; [~&C6pR
b = temp[j]; npcB+6
} xEK+NKTeV
} /<Nb/#8
} C N9lK29F)
m9*Lo[EXO
/** \EH:FM}l,
* @param data eF5?4??
* @param l RusC5\BUX
* @param i cv fh:~L
*/ "BB#[@
private void insertSort(int[] data, int start, int len) { 8+^?<FKa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2u9^ )6/
} y w"Tw
} !\{&^,y
} 4Q0@\dR9
} X|.M9zIx
@g|Eb}t
堆排序： qwAN=3@
wn*z*
package org.rut.util.algorithm.support; x?Wt\<|h!
UN`F|~@v
import org.rut.util.algorithm.SortUtil; ^+Ez[S{8
ejj|l
/** >:l;W4j
* @author treeroot "cerg?ix
* @since 2006-2-2 j7;v'eA`;7
* @version 1.0 Ks&~VU
*/ f.Y9gkt3d
public class HeapSort implements SortUtil.Sort{ T-7'#uB.m
3Rid1;L0U
/* (non-Javadoc) OHnHSb'?\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AYHfe#!
*/ sPNX)
public void sort(int[] data) { DbSl}N;
MaxHeap h=new MaxHeap(); k*bfq?E a
h.init(data); Uo{h. .7?
for(int i=0;i h.remove(); V43pZ]YZ>
System.arraycopy(h.queue,1,data,0,data.length); H)g:<
} #8;|_RU
Vv(!Ki}
private static class MaxHeap{ s{q)m@
{ .KCK_ d
void init(int[] data){ 4)=LOGW
this.queue=new int[data.length+1]; TQ&%SMCn
for(int i=0;i queue[++size]=data; hq9b
fixUp(size); yhr\eiJ@6
} 7 q<UJIf
} )>LQ{X.
{]ZZ]
private int size=0; `n8) o%E9
8$avPD3jx
private int[] queue; sg12C
SdUtAC2
public int get() { *(ex:1sW
return queue[1]; qE6:`f
} ?uUK9*N
:W5*fE(i
public void remove() { kr7f<;rmJ
SortUtil.swap(queue,1,size--); = PldXw0
fixDown(1); 5YIiO7@4
} ogv86d
file://fixdown J'.:l}g!1
private void fixDown(int k) { e,Xvt5
int j; uR"srn;^
while ((j = k << 1) <= size) { puS'9Lpp
if (j < size %26amp;%26amp; queue[j] j++; ]I"oS?
if (queue[k]>queue[j]) file://不用交换 p#.B Fy
break; |0(Z)s,
SortUtil.swap(queue,j,k); b:7;zOtF
k = j; i;^ e6A>
} 64}Oa+*s
} M;W{A)0i1
private void fixUp(int k) { 9\*xK%T+
while (k > 1) { CogLo&.
int j = k >> 1; !TY4C`/
if (queue[j]>queue[k]) \s;]Tg
break; y]=v+Q*+
SortUtil.swap(queue,j,k); ~az6n)
k = j; u;DF$
} Y',s|M1})\
} o_U=]mEDY
9;Ezm<VQ
} 'DF3|A],
xc R
} s)yEVh
+3vK=d_Va
SortUtil： ?[Q;275
Z~g~,q
package org.rut.util.algorithm; =HP_IG_
BZ1@?3
import org.rut.util.algorithm.support.BubbleSort; GQ&9by=}
import org.rut.util.algorithm.support.HeapSort; 3a#637%
import org.rut.util.algorithm.support.ImprovedMergeSort; @{.rDz
import org.rut.util.algorithm.support.ImprovedQuickSort; /woa[7Xe
import org.rut.util.algorithm.support.InsertSort; [8Ub#<]]
import org.rut.util.algorithm.support.MergeSort; =KNg "|
import org.rut.util.algorithm.support.QuickSort; ksY^w+>(!
import org.rut.util.algorithm.support.SelectionSort; -w 2!k
import org.rut.util.algorithm.support.ShellSort; !'ajpK
5@j?7%_8
/** @okC":Fw,
* @author treeroot .eXIbd<C
* @since 2006-2-2 Q"VFcp:
* @version 1.0 >U"f1q*$
*/ ? $pGG
public class SortUtil { %xLziF
public final static int INSERT = 1; +d\"n
public final static int BUBBLE = 2; 1SkGG0 W
public final static int SELECTION = 3; BmUEo$w
public final static int SHELL = 4; 4cJ^L <
public final static int QUICK = 5; 9`.b
public final static int IMPROVED_QUICK = 6; 8nES=<rz
public final static int MERGE = 7; n_v c}ame
public final static int IMPROVED_MERGE = 8; '.atbl
public final static int HEAP = 9; WKBPqfC
9R>A,x(
public static void sort(int[] data) { /j -LW1:N
sort(data, IMPROVED_QUICK); i1vBg}WHN
} n5UcivyX
private static String[] name={ N&S:=x:$S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3w{4G<I
}; 0Qw?.#[9
=DE5Wq19
private static Sort[] impl=new Sort[]{ Q(AOKp,F
new InsertSort(), 2b1LC!'U
new BubbleSort(), ..<(HH2
new SelectionSort(), l/LRr.x
new ShellSort(), w[PW-m^`
new QuickSort(), h'UWf"d
new ImprovedQuickSort(), E(8!VY ^
new MergeSort(), FO3!tJ\L
new ImprovedMergeSort(), z^~uq:
new HeapSort() S_c#{4n
}; peGXU/5.I
+?MjY[8j
public static String toString(int algorithm){ BEPDyy
return name[algorithm-1]; j/9FiuK
} 3KB)\nF#%
XPUH\I=
public static void sort(int[] data, int algorithm) { #k)G1Y[c
impl[algorithm-1].sort(data); d7Q. 'cyQ
} Js^ADUy
,n &|+&
public static interface Sort { :+]6SC0ql
public void sort(int[] data); I$qL=
} tDEpR
%~Nf,
public static void swap(int[] data, int i, int j) { `{F8#
int temp = data; z(1h^.
data = data[j]; ^fnRzX
data[j] = temp; n{Jvx>);
} X/5tZ@
} ,X$S4>