[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; q H+~rj
} Q{>{ e3z}
int i1=l; SDot0`s>
int i2=mid+1; AttDD{Ta
for(int cur=l;cur<=r;cur++){ S]<Hx_[}
if(i1==mid+1) G6I>Ry[2?
data[cur]=temp[i2++]; ^rx]Y;
else if(i2>r) * @oAM,@
data[cur]=temp[i1++]; Oh|Hy/&6W
else if(temp[i1] data[cur]=temp[i1++]; N[AX29
else n\d-^ml
data[cur]=temp[i2++]; nzU@}/A/
} :#+VH_%N
} Fd3V5h
VG)kPKoi
} %POoyH@D}
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改进后的归并排序: Ix}:!L
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package org.rut.util.algorithm.support; }VyDX14j
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import org.rut.util.algorithm.SortUtil; `|Ih"EZ
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/** p6|0JBm
* @author treeroot z`'{l{
* @since 2006-2-2 U"/":w ~
* @version 1.0 q&7J1
*/ *_@8v?
public class ImprovedMergeSort implements SortUtil.Sort { !AgW@
10t9Qv/
private static final int THRESHOLD = 10; G9d@vu
cR_85
/* ?9.SwIxU&
* (non-Javadoc) fsb_*sh&
* L-vy,[9)[*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :Fu.S1j$
*/ QF Vy2 q
public void sort(int[] data) { 6_rS!X
int[] temp=new int[data.length]; i#=s_v8
mergeSort(data,temp,0,data.length-1); |cUTP!iy
} CB\E@u,
Jwgd9a5
private void mergeSort(int[] data, int[] temp, int l, int r) { *+rO3% ;t
int i, j, k; v?vm-e
int mid = (l + r) / 2; r< sx On
if (l == r) B^Fe.ty
return; ncjtv"2R
if ((mid - l) >= THRESHOLD) AQ7w5}g+V
mergeSort(data, temp, l, mid); XcD$xFDZ
else K`Vi5hR~c
insertSort(data, l, mid - l + 1); TldqF BX
if ((r - mid) > THRESHOLD) +O8rjVg)
mergeSort(data, temp, mid + 1, r); 2guWWFS
else 2Sz?r d,0f
insertSort(data, mid + 1, r - mid); &>,c..Ke
YEqZ((H
for (i = l; i <= mid; i++) { eEl}.W}
temp = data; sba+J:#w
} gn4+$f~w
for (j = 1; j <= r - mid; j++) { ^~XsHmcQ
temp[r - j + 1] = data[j + mid]; SoC3)iqv/
} RzgA;ZC'
int a = temp[l]; ]jQj/`v1
int b = temp[r]; 3V2dN)\
for (i = l, j = r, k = l; k <= r; k++) { ^qvN:v$1
if (a < b) { h0ml#A`h
data[k] = temp[i++]; ,sF49CD
a = temp; T8'm{[C
} else { $z[FL=h)?+
data[k] = temp[j--]; _ x8gEK8
b = temp[j]; #s%_ L
} hc#Sy:T>
} CvkZ<i){
} ;xqN#mqq
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/** .! 'SG6 q
* @param data 3&`LVhx
* @param l '/O >#1
* @param i Fw.df<
*/ skeH~-`M@
private void insertSort(int[] data, int start, int len) { p#;I4d G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h$`zuz
} [a201I0 -
} r{g8CIwGQ
} j{&*]QTN
} E!"N}v
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堆排序： 4J5 RtK
M1HGXdN*B
package org.rut.util.algorithm.support; GUDz>(
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import org.rut.util.algorithm.SortUtil; o{[w6^D7
`En>o~L;
/** (baBi9<P=
* @author treeroot [%LIW%t|
* @since 2006-2-2 4"^v]&I
* @version 1.0 $ VTk0J-W
*/ r}nz )=\Cj
public class HeapSort implements SortUtil.Sort{ 'f_[(o+n
hEhvA6f,
/* (non-Javadoc) Q'~3Ik
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SX1w5+p$C
*/ Gr&YzbSX
public void sort(int[] data) { 89Ch'D
MaxHeap h=new MaxHeap(); qxbGUyH==
h.init(data); ,z5B"o{Et
for(int i=0;i h.remove(); X+KQ%Efo
System.arraycopy(h.queue,1,data,0,data.length); b=PB"-
} b|Sjh;
B`w@Xk'D
private static class MaxHeap{ H: rrY
~5:-;ZbZ
void init(int[] data){ ~O8Xj6
this.queue=new int[data.length+1]; k#"}oI{< 6
for(int i=0;i queue[++size]=data; W[B;;"ro
fixUp(size); `xsU'Wd^<
} 7El:$H
} M _e^KF
_FxQl]@
private int size=0; fI }v}L^
l<-0@(x)
private int[] queue; M/evZ?uis
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public int get() { /SKgN{tWe
return queue[1]; |PutTcjQ
} D:#e;K
dkAY%ztwo
public void remove() { V9/PkuT
SortUtil.swap(queue,1,size--); <2ymfL-q
fixDown(1); ->*'Y;t4
} ss'`[QhR2
file://fixdown }0 b[/ZwQ
private void fixDown(int k) { Z"5ewU<?
int j; ;t5e]
while ((j = k << 1) <= size) { `kM:5f+>W
if (j < size %26amp;%26amp; queue[j] j++; zrE Dld9
if (queue[k]>queue[j]) file://不用交换 8omk4 ;
break; f[+N=vr
SortUtil.swap(queue,j,k); l g43
k = j; aqoxj[V^3L
} V)3S.*]
} ;To][J
private void fixUp(int k) { m$H(l4wB>
while (k > 1) { lQl
int j = k >> 1; dZ{yNh.]
if (queue[j]>queue[k]) bFwc>
break; {N`<THPP
SortUtil.swap(queue,j,k); ~]C m
k = j; ST25RJC
} +?y9EZB%
} <j&LC /]o
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} lAAs/
(C60HbL
} <p\iB'y
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SortUtil： G;yh$n<"
B,avI&7M;S
package org.rut.util.algorithm; Yxd&hr
:}3;z'2]l
import org.rut.util.algorithm.support.BubbleSort; *WK0dn
import org.rut.util.algorithm.support.HeapSort; d,*#yzO
import org.rut.util.algorithm.support.ImprovedMergeSort; /d-d8n
import org.rut.util.algorithm.support.ImprovedQuickSort; .vk|aIG
import org.rut.util.algorithm.support.InsertSort; yp\sJc`
import org.rut.util.algorithm.support.MergeSort; :vRUb>z
import org.rut.util.algorithm.support.QuickSort; 0pl |
import org.rut.util.algorithm.support.SelectionSort; *Rj(~Q/t
import org.rut.util.algorithm.support.ShellSort; ~|.vz!A
BZ"+ ND9m_
/** ' Y cVFi
* @author treeroot gbL!8Z1h
* @since 2006-2-2 C">w3#M%
* @version 1.0 Z0Df~ @
*/ iR6w)
public class SortUtil { \SQwIM
public final static int INSERT = 1; a^QyYX}\qR
public final static int BUBBLE = 2; k.("<)
public final static int SELECTION = 3; P/;d|M(
public final static int SHELL = 4; |)+;d
public final static int QUICK = 5; uSU[Y,'x
public final static int IMPROVED_QUICK = 6; rA6lyzJ
public final static int MERGE = 7; 9e>Dqlv
public final static int IMPROVED_MERGE = 8; '980.
public final static int HEAP = 9; 3r]N\c
76j5
public static void sort(int[] data) { Cp[ NVmN
sort(data, IMPROVED_QUICK); o:8*WCiqrN
} "l.1 UB&
private static String[] name={ LH]<+Zren
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fBRU4q=^T
}; [mJmT->
Mpu8/i gX,
private static Sort[] impl=new Sort[]{ I|oS`iLl$
new InsertSort(), 7GVI={b
new BubbleSort(), K>x+*UPL
new SelectionSort(), M9scZuj
new ShellSort(), ~qj09
new QuickSort(), /yn%0Wish
new ImprovedQuickSort(), Ccx1#^`
new MergeSort(), PGaYYc3X
new ImprovedMergeSort(), !Ey=
new HeapSort() <JNiW8 PG
}; T_=iJ: Q
F#^<t$5t
public static String toString(int algorithm){ %=GF
return name[algorithm-1]; oR_qAb
} &)y$XsSMW
>*FHJCe
public static void sort(int[] data, int algorithm) { svTKt%6X
impl[algorithm-1].sort(data); eG05}
} cEc_S42Z
$VRVMY [q
public static interface Sort { quGvq"Y>
public void sort(int[] data); n^P~]1i
} ]/klKqz
#lld*I"d
public static void swap(int[] data, int i, int j) { 9KgGK cy%
int temp = data; <g4[p^A
data = data[j]; 2@~hELkk/E
data[j] = temp; 7u|X .X
} |0Y: /uL#)
} *`g'*R