[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; gZBKe!@a|
} ]7oo`KcQ|
int i1=l; U"oHPK3"TA
int i2=mid+1; )rlkQ'DN
for(int cur=l;cur<=r;cur++){ QpRk5NeLe
if(i1==mid+1) H9(UzyN>i
data[cur]=temp[i2++]; W39J)~D^@
else if(i2>r) 6q!Q([D_
data[cur]=temp[i1++]; o6:bmKWE
else if(temp[i1] data[cur]=temp[i1++]; ] SLeWs
else AEDBr<
data[cur]=temp[i2++]; 6y57m;JW/
} (ti!Y"e2
} o*2Mjd]r
9U4[o<G]=
} Z9q4W:jyS
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改进后的归并排序: S%B56|'
Ye$; d ~
package org.rut.util.algorithm.support; 7G*rxn"d
j}`ku9S~
import org.rut.util.algorithm.SortUtil; E1dhj3+3
>AY9F|:
/** +U%epq
* @author treeroot =sefT@<
* @since 2006-2-2 !ZvVj\{
* @version 1.0 %d40us8E
*/ ^f-)gZ&
public class ImprovedMergeSort implements SortUtil.Sort { vK+!m~kDu
.o,-a>jL
private static final int THRESHOLD = 10; 2v;&`04V<
Bj9FSKiH
/* _HjB'XNr(
* (non-Javadoc) SuNc&e#(
* 33wVP}e5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MPn/"Fij$
*/ +$xw0)|
public void sort(int[] data) { 7i'clB9!
int[] temp=new int[data.length]; )s4:&!
mergeSort(data,temp,0,data.length-1); N}<!k#d E
} Iza;~8dH5
SGba6b31
private void mergeSort(int[] data, int[] temp, int l, int r) { 5|>ms)[RQ
int i, j, k; i)$+#N
int mid = (l + r) / 2; eibkG
if (l == r) [*I7^h%
return; DiY74D
if ((mid - l) >= THRESHOLD) CfD4m,6
mergeSort(data, temp, l, mid); FP7N^HVBG=
else #<U@SMv
insertSort(data, l, mid - l + 1); 9ZR"Lo>3e+
if ((r - mid) > THRESHOLD) jC$~m#F
mergeSort(data, temp, mid + 1, r); O '`|(L
else %++S;#)~
insertSort(data, mid + 1, r - mid); Da!vGr
o?~27
for (i = l; i <= mid; i++) { .F2"tt?'
temp = data; L{l}G,j<
} (l9jczi
for (j = 1; j <= r - mid; j++) { >Q^ mR
temp[r - j + 1] = data[j + mid]; %cDDu$9;
} W$&*i1<a+
int a = temp[l]; Ag*?>I
int b = temp[r]; ?I:_FT
for (i = l, j = r, k = l; k <= r; k++) { lUp%1x+
if (a < b) { vjh'<5w9Wi
data[k] = temp[i++]; vpOGyvI
a = temp; ^k{/Yl
} else { g>eWX*Pa|
data[k] = temp[j--]; i_+e&Bjd4j
b = temp[j]; vRD(* S9^
} VS>hi~j
} o1b.a*SZ
} J7e/+W~
a?4Asn
/** ~m0=YAlk?
* @param data k>8OxpaWv?
* @param l )"|wWu
* @param i CdcBE.%<
*/ p]?eIovi
private void insertSort(int[] data, int start, int len) { zf5%|7o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZCb@!V}=
} <{hB&4oL
} 20}]b*C}
} Zm|il9y4m
} YcR: _ac
nw_|W)JVQ
堆排序： B}*\ pdJ
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package org.rut.util.algorithm.support; ,I+O;B:0
kK 5~hpv
import org.rut.util.algorithm.SortUtil; \IzZJGi
9$VdYw7D
/** 7lJ8<EP9 u
* @author treeroot V~5vR`}
* @since 2006-2-2 uC#]F@
* @version 1.0 p)"EenUK
*/ PJe\PGh
public class HeapSort implements SortUtil.Sort{ m7XN6zX
%u<r_^w5
/* (non-Javadoc) jGJf[:M&Pm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +9')G-`qj
*/ wN6sica|
public void sort(int[] data) { W~i0.rg|>
MaxHeap h=new MaxHeap(); eecIF0hp
h.init(data); &9.3-E47*
for(int i=0;i h.remove(); 5GPAt
System.arraycopy(h.queue,1,data,0,data.length); Vhb~kI!x
} b}u#MU
[xDIK8d:I
private static class MaxHeap{ h"}F3E
RC8-6s& ln
void init(int[] data){ sk~7"v{Y.
this.queue=new int[data.length+1]; i12G\Ye
for(int i=0;i queue[++size]=data; j.+,c#hFo
fixUp(size); IBNb!mPu%
} CUjRz5L
} 4j i#Q
{4p7r7n'
private int size=0; $U. 2"
dr(e)eD(R>
private int[] queue; 8 ?:W{GAo
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public int get() { ^r]-v++
return queue[1]; 4K4u]"1
} ~EYdEqS)
w>Ft5"z
public void remove() { T:CWxusL
SortUtil.swap(queue,1,size--); (>Pz3 7
fixDown(1); N5k9o:2
} ]x3 )OjH
file://fixdown Ml+f3#HP
private void fixDown(int k) { 8-b~p
int j; 6G-XZko~a
while ((j = k << 1) <= size) { dPgA~~
if (j < size %26amp;%26amp; queue[j] j++; Gt!Hm(
if (queue[k]>queue[j]) file://不用交换 o+R(ux"
break; W>P:EI1
SortUtil.swap(queue,j,k); G~Y#l@8M+
k = j; WCp[6g&%O
} kaDn= ={YM
} &N%-.&t'
private void fixUp(int k) { nXxnyom,
while (k > 1) { (hv}K*c{
int j = k >> 1; .=c@ps
if (queue[j]>queue[k]) ZQ[s:
break; Z@Qf0 c
SortUtil.swap(queue,j,k); 8R;E+B{
k = j; #`"B YFV[E
} Mq6_Q07
} EkN>5).
VC!g,LU|-
} o`}8ZtD
uQWd`7
} $>%zNq-F
&0-Pl.M
SortUtil： N=:xyv
F0Z cV>j}
package org.rut.util.algorithm; a6op
B#4 J![BX
import org.rut.util.algorithm.support.BubbleSort; yhyh\.
import org.rut.util.algorithm.support.HeapSort; uRw%`J4H
import org.rut.util.algorithm.support.ImprovedMergeSort; ]6HnK%
import org.rut.util.algorithm.support.ImprovedQuickSort; HYg7B
import org.rut.util.algorithm.support.InsertSort; Y[fbmn^
import org.rut.util.algorithm.support.MergeSort; 0j{KZy
import org.rut.util.algorithm.support.QuickSort; rX&?Xi1JeV
import org.rut.util.algorithm.support.SelectionSort; ;{cl*EN
import org.rut.util.algorithm.support.ShellSort; ^#2Y4[@
:#W>lq@H
/** hM`*-+Zb
* @author treeroot *Kw/ilI
* @since 2006-2-2 +;;pM[U
* @version 1.0 {*4Z9.2c*
*/ s-xby~
public class SortUtil { k8"[)lDc.
public final static int INSERT = 1; UIw6~a3E
public final static int BUBBLE = 2; eD 7Rv<
public final static int SELECTION = 3; rYr.mX
public final static int SHELL = 4; 2E3x=
public final static int QUICK = 5; ZbcpE~<a
public final static int IMPROVED_QUICK = 6; <8/lHQ^\)
public final static int MERGE = 7; H=9\B}
public final static int IMPROVED_MERGE = 8; %|3UWN
public final static int HEAP = 9; JTB5#S4W
eM`"$xc Oe
public static void sort(int[] data) { (tP^F)}e5
sort(data, IMPROVED_QUICK); YY<e]CriU
} ^zaN?0%S33
private static String[] name={ ]7{-HuQ8>}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ktKT=(F&
}; qT L@N9
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private static Sort[] impl=new Sort[]{ l=JK+uZ
new InsertSort(), U9B|u`72
new BubbleSort(), uJ$!lyJ6L
new SelectionSort(), Au/n|15->C
new ShellSort(), bx<7@
new QuickSort(), ,!4(B1@
new ImprovedQuickSort(), ,*Yu~4
new MergeSort(), D*j\gI
new ImprovedMergeSort(), #yVY!+A
new HeapSort() 4<&`\<jZ
}; u-. _;
Ofg-gCF8
public static String toString(int algorithm){ fhmqO0
return name[algorithm-1]; Kq;Yb&
} Ol24A^
Pw'3ya8
public static void sort(int[] data, int algorithm) { HIi5kv]}|
impl[algorithm-1].sort(data); MLcc
} y8un&LP
puz~Rfn#*
public static interface Sort { "tbKKh66
public void sort(int[] data); 2@aVoqrq#
} ``}EbOMG
dg4 QA_"
public static void swap(int[] data, int i, int j) { ;Z"6ve4
int temp = data; x,z+l-y
data = data[j]; nrMm](Y45
data[j] = temp; }cG!93
} ]`&ws
} TCFx+*fBd