[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; 9#@CmiIhy
} =F}e>D
int i1=l; *oX~z>aE
int i2=mid+1; >, }m=X8
for(int cur=l;cur<=r;cur++){ K06/ D!RD4
if(i1==mid+1) {m%X\s;ni
data[cur]=temp[i2++]; XP-4=0zd
else if(i2>r) XOy#?X/`
data[cur]=temp[i1++]; 4hv'OEl
else if(temp[i1] data[cur]=temp[i1++]; d.&~n`Rv!p
else M^^u{);q
data[cur]=temp[i2++]; %7?v='s=
} OAQ'/{~7
} {L8(5
vv,(ta@t2
} }`9}Q O
r8~U@$BBK
改进后的归并排序: qlg~W/
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package org.rut.util.algorithm.support; _9Ig`?<>I
:Y[r^=>
import org.rut.util.algorithm.SortUtil; ^OQ#Nz
HiG&`:P>q
/** R%Yws2Le2
* @author treeroot :q4Mnr
* @since 2006-2-2 "zO+!h'o
* @version 1.0 i4"xvLK4
*/ Bv |Z)G%RR
public class ImprovedMergeSort implements SortUtil.Sort { -j9R%+YW<
-3r&O:
private static final int THRESHOLD = 10; !lF|90=
C6eon4Ut
/* .0q %A1H
* (non-Javadoc) y*6r&989
* 5\tYs=>b<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L$x/T3@
*/ `#X{.
public void sort(int[] data) { ";e0-t6:
int[] temp=new int[data.length]; n6nwda
mergeSort(data,temp,0,data.length-1); F77[fp
} XI,F^K
"FaG5X(
private void mergeSort(int[] data, int[] temp, int l, int r) { o=_4v^
int i, j, k; Nu{RF
int mid = (l + r) / 2; |[|X
if (l == r) 0p$?-81BJ
return; q#PGcCtu
if ((mid - l) >= THRESHOLD) MT#9x>
mergeSort(data, temp, l, mid); MnsnW{VGX
else ' n~N*DH
insertSort(data, l, mid - l + 1); =k`(!r2"#
if ((r - mid) > THRESHOLD) 6SsZK)X
mergeSort(data, temp, mid + 1, r); t Q_}o[
else W.n@
insertSort(data, mid + 1, r - mid); R< xxwjt
a(8]y.`Tv
for (i = l; i <= mid; i++) { G$4lH>A&
temp = data; s$:]$&5
} 4aB`wA^x
for (j = 1; j <= r - mid; j++) { Z[`J'}?|
temp[r - j + 1] = data[j + mid]; Li=l/
} !HDk]
int a = temp[l]; qTyU1RU$9^
int b = temp[r]; ^m8\fCA*
for (i = l, j = r, k = l; k <= r; k++) { qr=U=oK
if (a < b) { VkhK2
data[k] = temp[i++]; Z/uRz]Hi
a = temp; M7,|+W/RK
} else { +U%lWE%
data[k] = temp[j--]; =GM!M@~,Ab
b = temp[j]; HA"dw2|
} xYt{=
} <WBGPzVZE
} YQX>)'
D?5W1m]E,s
/** o(~JZik
* @param data P!YT{}
* @param l G';oM;~/|
* @param i ieS5*@^k
*/ q}BQu@'H
private void insertSort(int[] data, int start, int len) { ~w[zX4@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ",8h>eEWK
} ;{Z2i%
} A7_*zR@
} ,%nmCetD@
} n7<<}wcV
"TjR]jnV(
堆排序： /'VCJjzZ
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package org.rut.util.algorithm.support; YBS]JCO
x5`q)!<&
import org.rut.util.algorithm.SortUtil; ]P<&CEk
/e{Oqhf[n
/** ( v ~/glf
* @author treeroot Z^GriL
* @since 2006-2-2 A7b7IM[
* @version 1.0 aeBth{
*/ 4VU5}"<
public class HeapSort implements SortUtil.Sort{ ~Nc]`95
"hlIGJ?_=
/* (non-Javadoc) oHi&Z$#!n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bR&hI9`%F
*/ c@nl;u)n
public void sort(int[] data) { X?7$JV-:
MaxHeap h=new MaxHeap(); ir,Zc\C
h.init(data); =C3l:pGMB;
for(int i=0;i h.remove(); x-Mp6
System.arraycopy(h.queue,1,data,0,data.length); 6gR=e+
} & vLX
Ca1)>1Vz
private static class MaxHeap{ ":-)mfgGU
A<.Q&4jb
void init(int[] data){ #sqDZ]\B
this.queue=new int[data.length+1]; M;43F*
for(int i=0;i queue[++size]=data; 9I.v?Tap
fixUp(size); .cZ&~ N
} ;_Rx|~!!
} 7L-%5:1%
x6)
private int size=0; RXWjFv~/
e&0B4wVAQ
private int[] queue; `chf8
y6PAXvv'{
public int get() { o$-8V:)6d
return queue[1]; v\MH;DW^Z
} )E[5lD61
mML^kgy\N
public void remove() { U<6k!Y9ny
SortUtil.swap(queue,1,size--); dl":?D4H
fixDown(1); 'g=yJ
} ,-b{oS~u
file://fixdown vy"Lsr3
private void fixDown(int k) { ;!~;05^iD
int j; M"9 zK[cz
while ((j = k << 1) <= size) { G8;S`-D1a,
if (j < size %26amp;%26amp; queue[j] j++; rf`Br\g8
if (queue[k]>queue[j]) file://不用交换 nL:vRJr-$
break; &%*S
SortUtil.swap(queue,j,k); MW4dPoa
k = j; PZ ogN
} 93!a
} >6kWmXK[
private void fixUp(int k) { 3x=F
while (k > 1) { _E30t( _.
int j = k >> 1; 3tm z2JIb
if (queue[j]>queue[k]) x#YOz7.
break; Czci6Lz
SortUtil.swap(queue,j,k); Sm Ei _u]'
k = j; H_AV3 ;
} l =_@<p
} ~.@fk}'R
<7jb4n<
} yav)mO~QU6
c^6`"\X^g
} T*{zL
R/Y/#X^b
SortUtil： tAC,'im:*
CMg83
package org.rut.util.algorithm; rvmI 8
KOmP-q=6
import org.rut.util.algorithm.support.BubbleSort; ,X$Avdc2
import org.rut.util.algorithm.support.HeapSort; iP!Y4F
import org.rut.util.algorithm.support.ImprovedMergeSort; G/8xS=
import org.rut.util.algorithm.support.ImprovedQuickSort; ?X9 =4Z~w
import org.rut.util.algorithm.support.InsertSort; 3=<iGX"z
import org.rut.util.algorithm.support.MergeSort; #P4dx'vm
import org.rut.util.algorithm.support.QuickSort; 7YN)T?
import org.rut.util.algorithm.support.SelectionSort; a[$.B2U
import org.rut.util.algorithm.support.ShellSort; g~y9j88?
G4{qWa/
/** 2?r8>#_*
* @author treeroot r2](~&i2
* @since 2006-2-2 a:|4q
* @version 1.0 bK].qN
*/ :te xl
public class SortUtil { 6m.Ku13;
public final static int INSERT = 1; Zn/9BO5
public final static int BUBBLE = 2; z1FbW&V
public final static int SELECTION = 3; F889JSZ%
public final static int SHELL = 4; /-hF<oNQ
public final static int QUICK = 5; hZ'oCRM
public final static int IMPROVED_QUICK = 6; QlS5B.h,
public final static int MERGE = 7; x ?V/3zW
public final static int IMPROVED_MERGE = 8; 6_y|4!,:W
public final static int HEAP = 9; 3'"M31iA
op|mRJBq;
public static void sort(int[] data) { ~4>Xi* B
sort(data, IMPROVED_QUICK); {4QOUqAu
} <{U{pCT%
private static String[] name={ Fm;)7.% >
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @\DD|o67
}; Ad,r(0a LZ
hKTg~y^
private static Sort[] impl=new Sort[]{ >4ct[fW+
new InsertSort(), Ds G *
new BubbleSort(), `Of wl%G
new SelectionSort(), eTF8B<?
new ShellSort(), rq1kj 8%2
new QuickSort(), KyyG8;G%
new ImprovedQuickSort(), ,Mhe:^3
new MergeSort(), !1RV[b.8
new ImprovedMergeSort(), p\{+l;`
new HeapSort() X]yERaJ,i
}; lz)"zV
g&Z7h4!\
public static String toString(int algorithm){ zkp Apj].
return name[algorithm-1]; V{h@nhq
} +r0eTP=zf
4{DeF@@
public static void sort(int[] data, int algorithm) { )R^Cqo'
impl[algorithm-1].sort(data); K7hf m%`N
} }K>HS\e
gr 5]5u
public static interface Sort { rEhf_[Dv
public void sort(int[] data); j&/.[?K
} 99!{[gOv
3] qlz?5
public static void swap(int[] data, int i, int j) { '!-?
int temp = data; fl"y@;;#h
data = data[j]; S(J\<)b
data[j] = temp; mei_aN7zW
} RGO:p]t|
} A&P1M6Of