[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; p;n)YY$
} U6=m4]~Z
int i1=l; lb1(1|#
int i2=mid+1; 9wKz p
for(int cur=l;cur<=r;cur++){ _<.R\rX&
if(i1==mid+1) q<JI!n1O
data[cur]=temp[i2++]; y|KDh'Y
else if(i2>r) ^d"tymDd
data[cur]=temp[i1++]; (6\A"jey\x
else if(temp[i1] data[cur]=temp[i1++]; a~ REFy
else $^7&bQ
data[cur]=temp[i2++]; !*%3um
} !9o8v0ZI
} )K2n!Fbd
NUL~zb
} O!f*@
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改进后的归并排序: PJAir8
m$J'nA
package org.rut.util.algorithm.support; rI]:| k
.: 7h=neEW
import org.rut.util.algorithm.SortUtil; 7*XG]=z/
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/** +N4h Q"
* @author treeroot Iz{AA-
* @since 2006-2-2 ((dG<
* @version 1.0 .^kTb2$X
*/ z|P& 8#txM
public class ImprovedMergeSort implements SortUtil.Sort { wU#Q>ut'%
GW $iK@
private static final int THRESHOLD = 10; <{-DYRiN
6!Isz1.re
/* v!`M=0k
* (non-Javadoc) YgWnPp
* \iVYhl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1<R \V
*/ w\t{'
public void sort(int[] data) { tOko %vY8
int[] temp=new int[data.length]; <1jiU%!w
mergeSort(data,temp,0,data.length-1); Ar'5kPzY>
} d&'6l"${
-`?V8OwY]
private void mergeSort(int[] data, int[] temp, int l, int r) { d'-^VxO0
int i, j, k; F37,u|
int mid = (l + r) / 2; <I|ryPU9{X
if (l == r) jA]xpf6}
return; V u!,tpa.
if ((mid - l) >= THRESHOLD) -=qmYf
mergeSort(data, temp, l, mid); fCVSVn"o
else Yp ? 2<
insertSort(data, l, mid - l + 1); |R[m&uOib
if ((r - mid) > THRESHOLD) YT:5J%"
mergeSort(data, temp, mid + 1, r); .HtDcGp
else 2C8M1^0:Z
insertSort(data, mid + 1, r - mid); $K G?d>wx
zR<jZwo]#
for (i = l; i <= mid; i++) { :e9E#o
temp = data; RZ.5:v6
} )US)-\^
for (j = 1; j <= r - mid; j++) { Aio0++r-
temp[r - j + 1] = data[j + mid]; (?3(=+t
} H5aUZ=
int a = temp[l]; QWP_8$Q
int b = temp[r]; eeX)JC0A
for (i = l, j = r, k = l; k <= r; k++) { n_+Iw,a'm
if (a < b) { 4v?S`w:6
data[k] = temp[i++]; 5y~[2jB:
a = temp; _6[NYv$"
} else { HYY|)Wo
data[k] = temp[j--]; G dooy~cn
b = temp[j]; '\;tmD"N5#
} lk'RWy"pw
} }Ag2c; aaq
} Av[jFk
#nd,cn
/** O|/tRkDMP{
* @param data {p/m+m
* @param l .KD07
* @param i f;Dz(~hw
*/ 5Tu.2.)N
private void insertSort(int[] data, int start, int len) { LSs={RD2+p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S&0x:VW
} ,s)H%
} ^q6~xC,/
} +1y#=iM{
} }0TY
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堆排序： 3m^BYr*y^
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package org.rut.util.algorithm.support; Zry>s0
N4:'X6u;
import org.rut.util.algorithm.SortUtil; eOb`uyi
qq`RfZjL
/** ZUu^==a
* @author treeroot zxh"@j$?
* @since 2006-2-2 A>?fbY2n
* @version 1.0 !2Orklzd1
*/ dd$N4&
public class HeapSort implements SortUtil.Sort{ ,uv$oP-
5c"kLq6r
/* (non-Javadoc) )=D&NO67Pq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &0g,Xkr
*/ cC4T3]4l'
public void sort(int[] data) { l;.BlHyu
MaxHeap h=new MaxHeap(); +6=!ve}
h.init(data); lK4+8VZ
for(int i=0;i h.remove(); <}%ir,8
System.arraycopy(h.queue,1,data,0,data.length); %gaKnT(|r
} +RkYW*|$S
1 XG-O
private static class MaxHeap{ pd#/;LT
)hug<D *h
void init(int[] data){ -?W@-*J
this.queue=new int[data.length+1]; 6"7qZq
for(int i=0;i queue[++size]=data; z'lNO| nU
fixUp(size); Ro<kp8
} Bu1z$#AC
} #lF<="y%X
K(gj6SrjV
private int size=0; i.sq^]j
guv@t&;t0
private int[] queue; o(P:f)B
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public int get() { g1~I*!p
return queue[1]; hptuTBD
} PlZiTP
K_QCYS.
public void remove() { [Ni4[\
SortUtil.swap(queue,1,size--); Y9;Mey*oW
fixDown(1); x1wxB 1)2
} 2?QJh2
file://fixdown Q$1K{14I
private void fixDown(int k) { Nd!VR+IZ
int j; vi8~j
while ((j = k << 1) <= size) { ^>Y%L(>
if (j < size %26amp;%26amp; queue[j] j++; &r%*_pX
if (queue[k]>queue[j]) file://不用交换 ^{:jY, ?]
break; iIE(zw)H
SortUtil.swap(queue,j,k); prtxE&-
k = j; k`TJ<Dv;
} (GG"'bYk
} 2~V Im#
private void fixUp(int k) { ZRB 0OH
while (k > 1) { Yys~p2
int j = k >> 1; t\i1VXtO
if (queue[j]>queue[k]) !dY:S';~
break; bZ.N7X PH
SortUtil.swap(queue,j,k); +ZKhmb!
k = j; iwQ-(GjM[A
} "Vq]|j,B/c
} 4Umsc>yfK
aLi_Hrb9
} Z~c'h
M"^Vf{X^
} 5vft}f
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SortUtil： xXZKj
pFTlhj)1
package org.rut.util.algorithm; n=? 0g;1!
P]"deB|
import org.rut.util.algorithm.support.BubbleSort; P/Kit?kngS
import org.rut.util.algorithm.support.HeapSort; 5L}>+js2
import org.rut.util.algorithm.support.ImprovedMergeSort; 5lnSa+_/f
import org.rut.util.algorithm.support.ImprovedQuickSort; ulf/C%t,R
import org.rut.util.algorithm.support.InsertSort; ).C!
import org.rut.util.algorithm.support.MergeSort; Rt^<xXX$
import org.rut.util.algorithm.support.QuickSort; p{q!jm~Nq
import org.rut.util.algorithm.support.SelectionSort; 4q13xX
import org.rut.util.algorithm.support.ShellSort; *O>aqu
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/** i ,pN1_-
* @author treeroot O[)]dD&'
* @since 2006-2-2 cmhN(==
* @version 1.0 eJw="
*/ Eqbe$o`dd
public class SortUtil { ShJK&70O
public final static int INSERT = 1; |<-F|v9og
public final static int BUBBLE = 2; <{420
public final static int SELECTION = 3; rAWl0y_m
public final static int SHELL = 4; +RV-VrV
public final static int QUICK = 5; S tnv>
public final static int IMPROVED_QUICK = 6; K3:|Tc(
public final static int MERGE = 7; T_?nd T2
public final static int IMPROVED_MERGE = 8; QZ3(u<f
public final static int HEAP = 9; HDVl5X`j'
fu<2t$Cn>
public static void sort(int[] data) { d:hL )x
sort(data, IMPROVED_QUICK); sD8m<
} NOr <,
private static String[] name={ }{xN`pZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^qO=~U!{
}; !UoU#YU
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private static Sort[] impl=new Sort[]{ C$LRY~\
new InsertSort(), 6_<s=nTX
new BubbleSort(), c~UAr k S
new SelectionSort(), i9eyrl+!
new ShellSort(), s S5fd)x
new QuickSort(), ydND$@; Z
new ImprovedQuickSort(), HNy/ -
new MergeSort(), x8?x/xE
new ImprovedMergeSort(), 5 n+ e
new HeapSort() {kPe#n>xT
}; q{cp|#m#G
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public static String toString(int algorithm){ LxlbD#<V
return name[algorithm-1]; o}MzqKfu
} Sf&?3a+f
jD/7/G*
public static void sort(int[] data, int algorithm) { XDkS ^9
impl[algorithm-1].sort(data); 8b:clvh
} &.Latx
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public static interface Sort { P$18Xno{
public void sort(int[] data); ZSPgci
} W 9Vz[
*el(+ib%
public static void swap(int[] data, int i, int j) { yYToiW *
int temp = data; n<?SZ^X{,/
data = data[j]; sr+gD*@h
data[j] = temp; #_?TIY:h
} 'sRg4?PT
} 3X$Q,