[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; m6uFmU*<M}
} *#9?9SYSk
int i1=l; [Ob09#B%:5
int i2=mid+1; ^r~O*
for(int cur=l;cur<=r;cur++){ "H#pN;)+
if(i1==mid+1) 5.$/]2VK
data[cur]=temp[i2++]; @jCMQYR
else if(i2>r) " GY3sam
data[cur]=temp[i1++]; !bs5w_@
else if(temp[i1] data[cur]=temp[i1++]; mw&'@M_(7
else {T-=&%||
data[cur]=temp[i2++]; x[=,$;o+
} 3Cgv($xl&
} "5204I
a<J<Oc!
} iPdS>ee
21O@yNpS$
改进后的归并排序: V:/v r
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package org.rut.util.algorithm.support; I? ="Er[g}
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import org.rut.util.algorithm.SortUtil; vnWt8?)]^
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/** EU7nS3K)O~
* @author treeroot 0t[ 1#!=k
* @since 2006-2-2 pgQ^w0BQV
* @version 1.0 ^5Zka!'X2Z
*/ @/,0()*dL
public class ImprovedMergeSort implements SortUtil.Sort { 7g$*K0m`
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private static final int THRESHOLD = 10; OLo?=1&;;
n&,X']z.
/* aJ@lT&.
* (non-Javadoc) fr'DV/T
* $xCJ5M4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %(|-+cLW+
*/ CaV@<T
public void sort(int[] data) { +p[O|[z
int[] temp=new int[data.length]; +/ {lz8^,
mergeSort(data,temp,0,data.length-1); <0;G4fE7[H
} d3\KUR^
,Wtgj=1!.
private void mergeSort(int[] data, int[] temp, int l, int r) { pedyWA>
int i, j, k; T"t.t%(8
int mid = (l + r) / 2; +:W/=C d(h
if (l == r) yuC|_nL
return; k!bG![Ie|
if ((mid - l) >= THRESHOLD) \u04m}h]
mergeSort(data, temp, l, mid); %k<+#j6ZH
else 39MOqVc
insertSort(data, l, mid - l + 1); hXvC>ie(i
if ((r - mid) > THRESHOLD) ;66{S'*[
mergeSort(data, temp, mid + 1, r); 3-oKY*jO
else [)?9|yY"`
insertSort(data, mid + 1, r - mid); J:J/AgJuH
fda4M
for (i = l; i <= mid; i++) { ii&ckg>]z
temp = data; 4]FS jVO
} !Na@T]J
for (j = 1; j <= r - mid; j++) { 6v74mIRn'?
temp[r - j + 1] = data[j + mid]; 2I|lY>Z
} v}id/brl
int a = temp[l]; 8H1&=)M=
int b = temp[r]; QeN7~ J
for (i = l, j = r, k = l; k <= r; k++) { rp^:{6O
if (a < b) { re,}}'
data[k] = temp[i++]; aK_k'4YTm
a = temp; }u1h6rd `
} else { 'Fc$?$c\
data[k] = temp[j--]; byTHSRt
b = temp[j]; gLY15v4?
} @=%g{
} 6Eus_aP
} jcjl q-x
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/** 8)2M%R\THn
* @param data OO'zIC<z
* @param l Ms5R7<O.7
* @param i _2)QL
*/ ?o`:V|<v
private void insertSort(int[] data, int start, int len) { R](cko=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }#2(WHf=<
} Q,Y^9g"B`~
} E^A!k=>
} >vR2K^
} 6$kh5$[
q: X^V$`
堆排序： 3[m2F O,Z
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package org.rut.util.algorithm.support; ggrkj0
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import org.rut.util.algorithm.SortUtil; x6$3KDQm
8F'm#0
/** s}yN_D+V
* @author treeroot TA8
* @since 2006-2-2 OOXP1L
* @version 1.0 -%Ce
*/ =diGuIB
public class HeapSort implements SortUtil.Sort{ rg=Ym.
K`j:F>b
/* (non-Javadoc) ,b5vnW\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6'x3g2C/
*/ g3yZi7b5FU
public void sort(int[] data) { Gm3`/!r
MaxHeap h=new MaxHeap(); B#}EYY
h.init(data); mxu!$wx
for(int i=0;i h.remove(); yhI;FNSf
System.arraycopy(h.queue,1,data,0,data.length); ]rNxvFN*j
} lgD%
t@a&&
private static class MaxHeap{ :t;i2Ck
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void init(int[] data){ V#+F*w?&D
this.queue=new int[data.length+1]; VS!v7-_N5
for(int i=0;i queue[++size]=data; kBnb9'.A1
fixUp(size); Rlm28
} HuKOb4g
} g$vOWSI+
3xmPY.
private int size=0; i2;,\FI@t%
a#x@e?GvI
private int[] queue; 'cAS>s"$}V
G:wO1f6
public int get() { ]"htOO
return queue[1]; (_+ux1h6^
} H0yM`7[y
IS`ADDU[S
public void remove() { (d*||"
SortUtil.swap(queue,1,size--); WTjmU=<\
fixDown(1); 8<32(D{
} %o0H#7'
file://fixdown e**'[3Y
private void fixDown(int k) { g6S-vSX,
int j; &3xda1H
while ((j = k << 1) <= size) { <OJqeUo+*\
if (j < size %26amp;%26amp; queue[j] j++; &&m1_K
if (queue[k]>queue[j]) file://不用交换 =vriraV"
break; :S7[<SwL
SortUtil.swap(queue,j,k); fF=tT C
k = j; 4L4u<
} \" m&WFm
} Lxv_{~I*
private void fixUp(int k) { 1,U)rx$H
while (k > 1) { ,S@B[+VZ
int j = k >> 1; g:U -kK!i
if (queue[j]>queue[k]) =NnG[#n%
break; Ol>/^3a=
SortUtil.swap(queue,j,k); /11CC \
k = j; a1[J>
} >Rb jdM5K4
} ~Ga{=OM??
\_i22/Et
} !L3|5:j
7s2*VKr
} /^I!)|At
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SortUtil： kGakdLl
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package org.rut.util.algorithm; f8UO`*O
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import org.rut.util.algorithm.support.BubbleSort; qLKL*m
import org.rut.util.algorithm.support.HeapSort; \yLFV9P}EL
import org.rut.util.algorithm.support.ImprovedMergeSort; %\)AT"
import org.rut.util.algorithm.support.ImprovedQuickSort; ymnK`/J!Q
import org.rut.util.algorithm.support.InsertSort; 1|>bG#|
import org.rut.util.algorithm.support.MergeSort; hw)z]
import org.rut.util.algorithm.support.QuickSort; G Uh<AG*+
import org.rut.util.algorithm.support.SelectionSort; =*>.z@WQ
import org.rut.util.algorithm.support.ShellSort; {~(XO@;b
a"Ly9ovW
/** \8vZZt
* @author treeroot |%3>i"Y@AK
* @since 2006-2-2 u09D`QPP]
* @version 1.0 KF!d?
*/ iV\*7
public class SortUtil { :`<MlX
public final static int INSERT = 1; <KStlfX
public final static int BUBBLE = 2; <A`SC;k\u
public final static int SELECTION = 3; km`";gUp>
public final static int SHELL = 4; @ Yo*h"s
public final static int QUICK = 5; 9\kEyb$F=
public final static int IMPROVED_QUICK = 6; 04}c_XFFE
public final static int MERGE = 7; Y;dqrA>@
public final static int IMPROVED_MERGE = 8; ]~ S zb
public final static int HEAP = 9; nf:wJ-;*
2uF'\y
public static void sort(int[] data) { {W%XSE
sort(data, IMPROVED_QUICK); "avG#rsH
} R?}%rP+^e
private static String[] name={ E5*pD*#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \Il?$Kb/
}; c`\qupnY
/N./l4D1K-
private static Sort[] impl=new Sort[]{ p6Ia)!xOGF
new InsertSort(), BE0Xg
new BubbleSort(), %;Z_`W
new SelectionSort(), "{~^EQq,
new ShellSort(), J'L6^-gV
new QuickSort(), SaRn>n\
new ImprovedQuickSort(), Q#&6J=}
new MergeSort(), gzlRK^5
new ImprovedMergeSort(), N%=,S?b
new HeapSort() >{Xyl):
}; @B?'Mu*
tdp>vI!
public static String toString(int algorithm){ /L2.7`5
return name[algorithm-1]; Fa{[kJ8z
} "1p, r&}
KmWd$Qy,
public static void sort(int[] data, int algorithm) { KR%NgV+}!0
impl[algorithm-1].sort(data); 'mF&`BN}b
} *w6F0>u
o+- 0`!yj
public static interface Sort { |f$gQI!XW
public void sort(int[] data); ]9wTAb
} (I{+%
azRp4~2?
public static void swap(int[] data, int i, int j) { S]4!uv^y
int temp = data; N,F[x0&?
data = data[j]; 5UG"i_TC
data[j] = temp; (tiE%nF+
} 6.|[;>Km
} .5A .[ZY)