[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; z'_Fg0kR{
} o~IAZU39
int i1=l; Rbf6/C
int i2=mid+1; hc[ K VLpS
for(int cur=l;cur<=r;cur++){ xBVOIc[4(
if(i1==mid+1) &Y=0 0
data[cur]=temp[i2++]; P,{Q k~iu
else if(i2>r) < ,*\t
data[cur]=temp[i1++]; ?gl&q+mv
else if(temp[i1] data[cur]=temp[i1++]; 3W%6n-*u
else "mW'tm1+
data[cur]=temp[i2++]; >8"Svt$
} &,k!,<IF
} vTO9XHc E
4SJ aAeIZ
} jU j\<aW
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改进后的归并排序: q>.7VN[ vE
-[L\:'Gp5
package org.rut.util.algorithm.support; Ak9{P`
%Hbq3U30
import org.rut.util.algorithm.SortUtil; Qh1pX}X
'K?h6?#
/** +Y sGH~jX
* @author treeroot C e-ru)
* @since 2006-2-2 G<$:[ +w
* @version 1.0 SKL4U5D{
*/ mrP48#Y+l
public class ImprovedMergeSort implements SortUtil.Sort { )t|:_Z
;`78h?`
private static final int THRESHOLD = 10; \%a0Lp{ I
[<RhaZz
/* XIl<rN@-
* (non-Javadoc) [`\VgKeu
* Ay?<~)H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u?Ffqt9'
*/ avRtYL
public void sort(int[] data) { '@t$3 hk
int[] temp=new int[data.length]; JY,$B-l
mergeSort(data,temp,0,data.length-1); ttsR`R1.k
} t{]Ew4Y4%O
kXwAw]ogN
private void mergeSort(int[] data, int[] temp, int l, int r) { *-nO,K>y`
int i, j, k; e"S?qpJK
int mid = (l + r) / 2; mAW.p=;
if (l == r) 9p W~Gz
return; X9m^i2tk
if ((mid - l) >= THRESHOLD) e'3V4iU]
mergeSort(data, temp, l, mid); 0~qc,-)3
else S0^a)#D &
insertSort(data, l, mid - l + 1); + `|A/w
if ((r - mid) > THRESHOLD) 9&Jf4lC94
mergeSort(data, temp, mid + 1, r); VHD+NY/
else xnZnbgO+
insertSort(data, mid + 1, r - mid); G"<#tif9K
h3?>jE=H
for (i = l; i <= mid; i++) { >@2<^&K`
temp = data; _i05'_
} QHR,p/p
for (j = 1; j <= r - mid; j++) { "v1{
temp[r - j + 1] = data[j + mid]; Ul}RT xJ
} 7iP+!e}$.
int a = temp[l]; FiUQ2w4
int b = temp[r]; &: Q'X
for (i = l, j = r, k = l; k <= r; k++) { >w S'z]T9
if (a < b) { pm6#azQ
data[k] = temp[i++]; ?})A-$f ~
a = temp; U~x]2{}
} else { :ppaq
data[k] = temp[j--]; EF`}*7)
b = temp[j]; 2ioHhcYdJU
} <V&0GAZ
} b>uD-CSA
} B>53+GyMV
W@d&X+7e
/** l f>/
* @param data mku@n;Hl_
* @param l )2[)11J9t
* @param i n28JWkK8
*/ *Al@|5
private void insertSort(int[] data, int start, int len) { -<#) ]um
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WNyW1?"
} ,PlH|
} 8 lggGt
} b80#75Bj>
} 2v{WX
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堆排序： %qc_kQ5%
!..<_qfw
package org.rut.util.algorithm.support; Aw#<:6-
d(q1?{zr4
import org.rut.util.algorithm.SortUtil; f$lb.fy5
@]Cg5QW>T
/** 0m_yW$w
* @author treeroot TLwxP"
* @since 2006-2-2 *&_*G~>D
* @version 1.0 <],{at` v
*/ cH5i420;aO
public class HeapSort implements SortUtil.Sort{ eCGr_@1
}A3/(
/* (non-Javadoc) Y1PR?c Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HI8mNX3 "j
*/ xUdF.c
public void sort(int[] data) { H*W>v[>
MaxHeap h=new MaxHeap(); @| z _&E
h.init(data); 6 U.Jaai:
for(int i=0;i h.remove(); <h#*wy:o2
System.arraycopy(h.queue,1,data,0,data.length); 3TwjC:Yhv2
} S=qh7ML
@A,8>0+
private static class MaxHeap{ C~En0G1
Hx.|5n,5
void init(int[] data){ f+Y4~k
this.queue=new int[data.length+1]; &=@{`2&
for(int i=0;i queue[++size]=data; Bu:%trlgV
fixUp(size); :>&q?xvA
} i2<z"v63
} Sdq}?-&Sa
!ku}vTe
private int size=0; <6Q^o[L
5H3o?x
private int[] queue; Xh"9Bcjf
a{8a[z
public int get() { `D+zX
return queue[1]; ZLQmEF[>
} nb_/1{F
^Om}9rXw1
public void remove() { /2K"Mpf8
SortUtil.swap(queue,1,size--); R~g|w4a@sC
fixDown(1); LHY7_"u#
} "tyRnUP
file://fixdown h#0n2o#
private void fixDown(int k) { i%i~qTN
int j; yY$^ R|t
while ((j = k << 1) <= size) { I!/32* s1t
if (j < size %26amp;%26amp; queue[j] j++; 4=,J@N-
if (queue[k]>queue[j]) file://不用交换 HoQb.Z
break; R_EU|a
SortUtil.swap(queue,j,k); k3Yu"GY^
k = j; #BRIp(65-6
} uaIAVBRcS
} u&~Xgq5[
private void fixUp(int k) { .tRm1&Qi
while (k > 1) { A{_CU-,
int j = k >> 1; alJ0gc2?
if (queue[j]>queue[k]) ,hzRqFg2
break; +`>7cy%cZ
SortUtil.swap(queue,j,k); DAw1S$dM
k = j; D,IT>^[^7
} vQ< ~-E
} >LPb>t5%p
Pe:)zt0
} \Z5Wp5az},
;+75"=[YT
} ?+}Su'pv}
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SortUtil： ;lmg0dtJ
Luao?;|U
package org.rut.util.algorithm; O?vh]o
{C w.?JU
import org.rut.util.algorithm.support.BubbleSort; H&s`Xr
import org.rut.util.algorithm.support.HeapSort; ~~yng-3)1
import org.rut.util.algorithm.support.ImprovedMergeSort; QFnuu-82"
import org.rut.util.algorithm.support.ImprovedQuickSort; #IH9S5B [
import org.rut.util.algorithm.support.InsertSort; x(c+~4:_M
import org.rut.util.algorithm.support.MergeSort; o@A`AA9
import org.rut.util.algorithm.support.QuickSort; 89d%P J0
import org.rut.util.algorithm.support.SelectionSort; ~ZafTCa;
import org.rut.util.algorithm.support.ShellSort; nf pO
-'c qepC{T
/** /Am9w$_T[
* @author treeroot *k(FbZ
* @since 2006-2-2 yl$Ko
* @version 1.0 bZ`#;D<
*/ u-~ec{oBu
public class SortUtil { D:k< , {
public final static int INSERT = 1; "I56l2dxd
public final static int BUBBLE = 2; 8i;1JA
public final static int SELECTION = 3; [60y.qE
public final static int SHELL = 4; wXQu%F3
public final static int QUICK = 5; i?^L",[
public final static int IMPROVED_QUICK = 6; g:uVl;>
public final static int MERGE = 7; TX5??o
public final static int IMPROVED_MERGE = 8; #GGa,@O
public final static int HEAP = 9; F,vkk{Z>
`GE8?UO-
public static void sort(int[] data) { .7.1JT#@A7
sort(data, IMPROVED_QUICK); \(LD<-a
} Kjbk zc1
private static String[] name={ =.s0"[%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pbKmFweq
}; emQc%wd{
W(s5mX,Kv
private static Sort[] impl=new Sort[]{ =b66H]h?
new InsertSort(), 5_yw
new BubbleSort(), i).Vu}W#S
new SelectionSort(), hV $Zr4'
new ShellSort(), 4evN^es'I_
new QuickSort(), $j,$O>V
new ImprovedQuickSort(), `Ku:%~$/
new MergeSort(), `BZ|[ q3
new ImprovedMergeSort(), H%vgPQ8
new HeapSort() .+(ED
}; 7&,$
T}J)n5U}\
public static String toString(int algorithm){ TgJ+:^+0
return name[algorithm-1]; EkV#i
} (J4( Ge
NEIF1(:
public static void sort(int[] data, int algorithm) { <LZ#A@]71
impl[algorithm-1].sort(data); xVsI#`<a
} 0]f/5jvLj
KHP/Y{mH
public static interface Sort { ?o)?N8U
public void sort(int[] data); nKd'5f1
} !]?kvf-3e
G5|nt#>
public static void swap(int[] data, int i, int j) { xjD$i'V+
int temp = data; cGs&Kn;h
data = data[j]; xrXfZ>$5bM
data[j] = temp; :CqR1_n%
} .|CoueH
} |L89yjhWBs