[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; Zn]njf1x
} fF*{\
int i1=l; 6I`Lszs
int i2=mid+1; leSR2os
for(int cur=l;cur<=r;cur++){ {D9m>B3"{
if(i1==mid+1) ~KF>Jow?Y
data[cur]=temp[i2++]; 7xr@$-U
else if(i2>r) w;Jby
data[cur]=temp[i1++]; N akSIGm
else if(temp[i1] data[cur]=temp[i1++]; fXJbC+
else 8kwe._&)
data[cur]=temp[i2++]; Bw;LGEHi|
} /:],bNb
} l[D5JnWxt
)lsR8Hi8
} 2Yt+[T*
#ovmX
改进后的归并排序: ExDv7St1(k
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package org.rut.util.algorithm.support; jR[3{ Reo
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import org.rut.util.algorithm.SortUtil; +>uiI4g
-lNq.pp3-$
/** tB i16=
* @author treeroot R&`; C<6}D
* @since 2006-2-2 ~7}aW#
* @version 1.0 wxx3']:
*/ _'"whZ)2
public class ImprovedMergeSort implements SortUtil.Sort { y$7vJl.uS/
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private static final int THRESHOLD = 10; ,fa'
8UahoNrSt
/* r%^l~PN
* (non-Javadoc) Gec?
* c'8pTP%[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c4'k-\JvT
*/ 9h$08l
public void sort(int[] data) { jLZ^EM-
int[] temp=new int[data.length]; c{X:0man
mergeSort(data,temp,0,data.length-1); --}5%6
} " A}S92
%Ct^{k~1
private void mergeSort(int[] data, int[] temp, int l, int r) { nGqD{!i<
int i, j, k; O^+H:Y|
int mid = (l + r) / 2; yD-L:)@"
if (l == r) 7ZsBYP8%
return; k,mgiGrQ
if ((mid - l) >= THRESHOLD) 7i$)iNW
mergeSort(data, temp, l, mid); sOY+X
else v3ky;~ke
insertSort(data, l, mid - l + 1); OdrnPo{
if ((r - mid) > THRESHOLD) ?{Rv/np=F
mergeSort(data, temp, mid + 1, r); N#Y|MfLc
else `3CdW
insertSort(data, mid + 1, r - mid); [7btoo|P]
OrJuE[R.
for (i = l; i <= mid; i++) { >Yf)]e-
temp = data; G'M;]R9EP
} K#e&yY
for (j = 1; j <= r - mid; j++) { ~7$4w# of0
temp[r - j + 1] = data[j + mid]; _,?<r&>v6
} KT>eE
int a = temp[l]; oN\IQ7oI
int b = temp[r]; BsJ d*-:X
for (i = l, j = r, k = l; k <= r; k++) { ,3As Ng
if (a < b) { ]#fmih^
data[k] = temp[i++]; m/T3Um
a = temp; P~H?[ ;
} else { lI<Q=gd
data[k] = temp[j--]; oieJ7\h]m
b = temp[j]; 3;hztCZj
} hN5?u:
} m 3Y@p$i5
} ~mR@L`"l
t6+c"=P#
/** ]"2;x
* @param data C2[* $ 1U
* @param l XDtMFig
* @param i 1[g -f,
*/ @ gv^
private void insertSort(int[] data, int start, int len) { WE*L=_zDS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /qd5{%:
} h|T_ k
} +'ZJ]
} >OLKaghV.5
} ,DZoE~
0eP ]
堆排序： 3hi0
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package org.rut.util.algorithm.support; 3!H&bOF
JdK'~-L
import org.rut.util.algorithm.SortUtil; pXy'Ss@y
U{JD\G8m
/** 5OR2\h!XZt
* @author treeroot <?&Y_
* @since 2006-2-2 ,Hzz:ce
* @version 1.0 2lc
*/ w1&\heSQ
public class HeapSort implements SortUtil.Sort{ WCdl 25L#
o _G,Ph!7
/* (non-Javadoc) aWCZ1F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M&v;#CV
*/ j TyR+#Wn
public void sort(int[] data) { ?^Q8#Y^M
MaxHeap h=new MaxHeap(); 2d#3LnO
h.init(data); Q:5^K
for(int i=0;i h.remove(); "K9/^S_
System.arraycopy(h.queue,1,data,0,data.length); vh/&KTe?:
} N*w6D:
%6%~`((4
private static class MaxHeap{ ' a>YcOw
)-s9CWJv
void init(int[] data){ z]%c6ty
this.queue=new int[data.length+1]; I,lX;~xb
for(int i=0;i queue[++size]=data; u^4$<fd
fixUp(size); (2J\o
} JqmxS*_P
} n6xJ
HVHd@#pDZ
private int size=0; V'q?+p] a
RDSkFK( D
private int[] queue; {O=PVW2S
#aua6V!"
public int get() { z8@[]6cW
return queue[1]; K7-z.WTUR
} B4Fuvi
J85S'cwZZ
public void remove() { 0Xw$l3@N^
SortUtil.swap(queue,1,size--); T2ZB(B D
fixDown(1); -\9K'8 C
} EEn8]qJC
file://fixdown @"G+kLv0
private void fixDown(int k) { dHsI<:T#
int j; nf0]<x2
while ((j = k << 1) <= size) { \V_Tc`
if (j < size %26amp;%26amp; queue[j] j++; hjgB[ &U>
if (queue[k]>queue[j]) file://不用交换 r6QshCA"
break; Ht"?ajW{
SortUtil.swap(queue,j,k); \:m1{+l
k = j; KPrH1 [VU
} _qO'(DKylC
} `6:B0-r
private void fixUp(int k) { qI%X/'
while (k > 1) { Z_h-5VU-
int j = k >> 1; j2RdBoCt
if (queue[j]>queue[k]) 0sA+5*mdM
break; 0g`$Dap
SortUtil.swap(queue,j,k); p>l:^-N;f
k = j; I'E7mb<2
} {ew; /;
} j>`-BN_
[0n[\& 0
} jcbq#
,(A $WT@e
} YvG=P<_xw
B2,c_[UZ.
SortUtil： q|g>;_
9vauCIfVC
package org.rut.util.algorithm; 6E#znRi6IE
^~;"$=Wf
import org.rut.util.algorithm.support.BubbleSort; 7|PB6h3
import org.rut.util.algorithm.support.HeapSort; Ii&\LJ
import org.rut.util.algorithm.support.ImprovedMergeSort; RG.wu6Av
import org.rut.util.algorithm.support.ImprovedQuickSort; v{X<6^g
import org.rut.util.algorithm.support.InsertSort; .%EYof
import org.rut.util.algorithm.support.MergeSort; , .E>
import org.rut.util.algorithm.support.QuickSort; +'$5Jtz
import org.rut.util.algorithm.support.SelectionSort; RKPX*(i~
import org.rut.util.algorithm.support.ShellSort; pft-.1py
t$e'[;w
/** WDi2m"
* @author treeroot +ag_w}
* @since 2006-2-2 !(HPx@_
* @version 1.0 `=$p!H8
*/ i IM\_<?
public class SortUtil { I.[Lv7U-
public final static int INSERT = 1; }/lyrjV
public final static int BUBBLE = 2; P-/"sD
public final static int SELECTION = 3; bXi!_'z$
public final static int SHELL = 4; }P'c8$
public final static int QUICK = 5; v!W{j&N
public final static int IMPROVED_QUICK = 6; PX*}.L *x
public final static int MERGE = 7; 1\a.o[g3e
public final static int IMPROVED_MERGE = 8; W\2 ']7}e
public final static int HEAP = 9; 7$*X
:,ucJ|
public static void sort(int[] data) { #g/m^8n?s
sort(data, IMPROVED_QUICK); \10KIAQ
} Z(XohWe2
private static String[] name={ 3 "iBcsLn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "AP$)xM-:
}; )Dp0swJ
B@U'7`v
private static Sort[] impl=new Sort[]{ ed2r<H$
new InsertSort(), iB|htH'T
new BubbleSort(), NBL%5!'
new SelectionSort(), H:)_;k
new ShellSort(), @^Rl{p
new QuickSort(), UM/!dt}DnF
new ImprovedQuickSort(), {;N2 &S o
new MergeSort(), 6e8 gFQ"w2
new ImprovedMergeSort(), .DI?-=p|_#
new HeapSort() osl\j]U8
}; 2qot(Zs1i
,+5:}hR+
public static String toString(int algorithm){ d'"|Qg_'
return name[algorithm-1]; wX5q=I
} d N$,AOT
!S%0#d2
public static void sort(int[] data, int algorithm) { W4,'?o
impl[algorithm-1].sort(data); ('{aOiSH
} _, E/HAX
Cs(sar:7
public static interface Sort { >(-A"jf
public void sort(int[] data); *4e?y
} \1SC:gN*#
]}kw'&
public static void swap(int[] data, int i, int j) { ap8q`a{j^
int temp = data; 4l7 Ny\J
data = data[j]; zn>+\
data[j] = temp; d@p#{ -
} ZS%W/.?
} ;{aGEOP'U