[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; ,xwiJfG; ]
} #X(2
int i1=l; ys=2!P-[#
int i2=mid+1; 175e:\Tw
for(int cur=l;cur<=r;cur++){ %1&X+s3
if(i1==mid+1) `zoHgn7B9q
data[cur]=temp[i2++]; c |0p'EQ
else if(i2>r) !t%1G.
data[cur]=temp[i1++]; P|NGAd
else if(temp[i1] data[cur]=temp[i1++]; 5BrN uR$
else V_i&@<J
data[cur]=temp[i2++]; `E~"T0RX
} Y3@+aA
} :tWkK$
PYQ0&;z
} xM())Z|2
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改进后的归并排序: f]*;O+8$LN
enk`I$Xx
package org.rut.util.algorithm.support; ch#)XomN
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import org.rut.util.algorithm.SortUtil; FH</[7f;@N
|s/)lA:9
/** %YVPm*J~
* @author treeroot uc9h}QJ*
* @since 2006-2-2 9>{fsy
* @version 1.0 `;mgJD
*/ h-p}Qil,
public class ImprovedMergeSort implements SortUtil.Sort { J;sQvPHV8
7[e-3
private static final int THRESHOLD = 10; >VhZv75
rBJ`=oz
/* O%%Q./oh
* (non-Javadoc) $uLTYu
* mJ%^`mrI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <*vR_?!
*/ F`KXG$
public void sort(int[] data) { $H*8H`
int[] temp=new int[data.length]; u?V}pYX
mergeSort(data,temp,0,data.length-1); ;X}2S!7Ko
} 1_7p`Gxt[/
p,=IL_
private void mergeSort(int[] data, int[] temp, int l, int r) { kB+$Kt<]L
int i, j, k; o0WwlmB5
int mid = (l + r) / 2; ybpOk
if (l == r) )[eTZg
return; _J*l,]}S
if ((mid - l) >= THRESHOLD) Zx8$M5
mergeSort(data, temp, l, mid); OX,em Ti
else %C%3c4+Oh
insertSort(data, l, mid - l + 1); u.E>d9
if ((r - mid) > THRESHOLD) H~*N:$C
mergeSort(data, temp, mid + 1, r); 0Hrvr
else )]n>.ZmLCB
insertSort(data, mid + 1, r - mid); g Cp`J(2v:
kNP-+o
for (i = l; i <= mid; i++) { Vc0j)3
temp = data; LYAGpcG
} <hzHrx'o{
for (j = 1; j <= r - mid; j++) { Cuylozj$&
temp[r - j + 1] = data[j + mid]; Dx\~#$S!=
} f0eQq;D$K
int a = temp[l]; PE.UNo>o
int b = temp[r]; tOXyle~C
for (i = l, j = r, k = l; k <= r; k++) { Ew4D';&;
if (a < b) { 1GA.c:
data[k] = temp[i++]; !bzWgD7j
a = temp; ZXLAX9|
} else { 6Takx%U
data[k] = temp[j--]; F=&,=r'Q8
b = temp[j]; _)@G,E33f@
} pZ $>Hh#
} 0~<?*{~
} h0-.9ym
;{8 X+H
/** TFldYKd/l
* @param data ~M7X]
* @param l iwIn3R,
* @param i 3 85qQppz
*/ Cw^iA U
private void insertSort(int[] data, int start, int len) { /.s L[X-G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UV|{za$&/
} W+Piqf*
} 6r^ZMW
} o>*`wv
} ,or;8aYc#
[-`s`g-
堆排序： (4z_2a(Dl,
=f@71D1
package org.rut.util.algorithm.support; 2cu2S"r
wo62R&ac
import org.rut.util.algorithm.SortUtil; A99;bf}"
Zk7!CJVM
/** Lww&[|k.
* @author treeroot ,aWI&ve6
* @since 2006-2-2 %-YWn`yEm
* @version 1.0 G;u 6p
*/ 3]iw3M
public class HeapSort implements SortUtil.Sort{ ZT"vVX-)G
o^5UHFxTCB
/* (non-Javadoc) g[y&GCKY!=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ce//;Op
*/ @@a#DjE%/
public void sort(int[] data) { Bd*Ok]
MaxHeap h=new MaxHeap(); ^69(V LK
h.init(data); G(A7=8vW
for(int i=0;i h.remove(); Y8}y0]V
System.arraycopy(h.queue,1,data,0,data.length); 9k4z__Ke
} F)=<|,b1
%X}D(_
private static class MaxHeap{ x`2dN/wDhf
5T"h7^}e
void init(int[] data){ -5os0G80
this.queue=new int[data.length+1]; Tq^B>{S"
for(int i=0;i queue[++size]=data; (^T}6t3+4
fixUp(size); jn]l!nm
} U e-AF#
} ui"`c%2n
1C=42ZZ&2
private int size=0; ^^V+0 l
zWN]#W`
private int[] queue; @<OsTF L
-0'<7FSQ
public int get() { @6[aLF]F
return queue[1]; aR)UHxvX
} M~X~2`fFH
l"&iSq!3=
public void remove() { e\#aQ1?"
SortUtil.swap(queue,1,size--); ?(khoL t
fixDown(1); ;p,Kq5,l
} F)l1%FCm
file://fixdown ~hP]<$v
private void fixDown(int k) { <,*w$
int j; ko{&~
while ((j = k << 1) <= size) { yqJ>Z%)hf
if (j < size %26amp;%26amp; queue[j] j++; _4{3^QZq5
if (queue[k]>queue[j]) file://不用交换 i*xVD`x~
break; dF|n)+C~R
SortUtil.swap(queue,j,k); #BEXj<m+J
k = j; >0:=<RW
} |+-b#Sa9
} ?+c-m+;wj
private void fixUp(int k) { 3nq4Y'
while (k > 1) { 3"HEXJMc
int j = k >> 1; # b3 14
if (queue[j]>queue[k]) C:!&g~{cKi
break; fX LsLh+~D
SortUtil.swap(queue,j,k); aTaL|&(
k = j; }PMlG
} IQ JFL +f
} GB*^?Ii
!bW^G} <t
} qP/McH?
Kk% IN9
} +>tSO!}[
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SortUtil： t,~feW,
Ch=jt*0
package org.rut.util.algorithm; +nYF9z2
3cH^ ,F
import org.rut.util.algorithm.support.BubbleSort; 5uM`4xkj
import org.rut.util.algorithm.support.HeapSort; vQ5rhRG)E
import org.rut.util.algorithm.support.ImprovedMergeSort; 0LWV.OIIC
import org.rut.util.algorithm.support.ImprovedQuickSort; PywUPsJ
import org.rut.util.algorithm.support.InsertSort; [7{cf`C
import org.rut.util.algorithm.support.MergeSort; !4"$O@U4
import org.rut.util.algorithm.support.QuickSort; n2opy8J#!
import org.rut.util.algorithm.support.SelectionSort; tB0f+ wC
import org.rut.util.algorithm.support.ShellSort; SphP@J<ONW
w\JTMS$
/** *Xu?(Jd
* @author treeroot =`qEwA
* @since 2006-2-2 rB =c
* @version 1.0 pW<l9W
*/ EP{ji"/7[
public class SortUtil { AB.ZmR9|
public final static int INSERT = 1; [xDn=)`{V
public final static int BUBBLE = 2; C61E=$
public final static int SELECTION = 3; 7%|HtBXv^
public final static int SHELL = 4; X-yS9E
public final static int QUICK = 5; fHF*#
public final static int IMPROVED_QUICK = 6; u~'j?K.^
public final static int MERGE = 7; OV^?cA
public final static int IMPROVED_MERGE = 8; JGlp7wro
public final static int HEAP = 9; . N5$s2t
SQdK`]4
public static void sort(int[] data) { [WR*u\FF
sort(data, IMPROVED_QUICK); V4<f4|IL
} "6WE6zq
private static String[] name={ &7w*=f8I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,u5iiR
}; {>yy3(N
.UUT@ w?
private static Sort[] impl=new Sort[]{ _]kw|[)
new InsertSort(), ?J5E.7o
new BubbleSort(), T mH5+
new SelectionSort(), zrA=?[
new ShellSort(), P9gAt4i
new QuickSort(), 5BMrn0
new ImprovedQuickSort(), ;C5 J^xHI
new MergeSort(), ](k}B*Abh
new ImprovedMergeSort(), kI~;'M
new HeapSort() AR)A <
}; 3Q#3S
Y-y}gc_L
public static String toString(int algorithm){ l=>FoJf!*<
return name[algorithm-1]; Pu2cU5n
} JIMi~mEiN
k|rbh.Q
public static void sort(int[] data, int algorithm) { )tx!BJiZ[
impl[algorithm-1].sort(data); 5Noy~;
} %Xl(wvd
q:P44`Aq
public static interface Sort { rVb61$
public void sort(int[] data); }ho6
} ]L!:/k,=S
vn.j>;E'
public static void swap(int[] data, int i, int j) { A{wSO./3
int temp = data; 5eX+9niY
data = data[j]; 7;ddzxR4
data[j] = temp; u/HNXJ7M`9
} tf{o=X.)
} <)$JA