[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; =O)dHY}
} !PzlrH)M=p
int i1=l; u!X$M?D4
int i2=mid+1; 4?AggqW
for(int cur=l;cur<=r;cur++){ [Yzh(a8
if(i1==mid+1) coxMsDs
data[cur]=temp[i2++]; #.(6.Li
else if(i2>r) J=gerdIk
data[cur]=temp[i1++]; lF\oEMd*
else if(temp[i1] data[cur]=temp[i1++]; h>6'M
else d2x|PpmH
data[cur]=temp[i2++]; &.Jp,Xt)
} dfDz/sD*
} [kyF|3k~
CjtXU=}A
} /8GgEW9Q~G
IR+dGqIjZb
改进后的归并排序: >!OD[9
>HUU`= SC
package org.rut.util.algorithm.support; \I@=EF- &
5Z7<X2
import org.rut.util.algorithm.SortUtil; N%A[}Y0;MW
\V|\u=@H
/** :/BU-SFK^
* @author treeroot .]qj];m
* @since 2006-2-2 $f-f0t'
* @version 1.0 B?nQUIb:
*/ }'mBqn
public class ImprovedMergeSort implements SortUtil.Sort { A3p@hQl
-$E_L:M
private static final int THRESHOLD = 10; 8}\Lt
/.<T^p@\&
/* z\,g %u41
* (non-Javadoc) 1}C|Javkn
* /3!KfG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u6AReL'f
*/ IRemF@
public void sort(int[] data) { <|NP!eMsw8
int[] temp=new int[data.length]; 4eym$UWw
mergeSort(data,temp,0,data.length-1); ;[]{O5TB
} BpL,<r,
/#z5bo
private void mergeSort(int[] data, int[] temp, int l, int r) { G SXe=?
int i, j, k; ISI\<qx
int mid = (l + r) / 2; 8'Z#sM^E
if (l == r) "r!O9X6
return; !e?GS"L~
if ((mid - l) >= THRESHOLD) O!}TZfC
mergeSort(data, temp, l, mid); (bxSN@hp2
else L\Uf+d:&}G
insertSort(data, l, mid - l + 1); =h?WT*
if ((r - mid) > THRESHOLD) y]B?{m``6
mergeSort(data, temp, mid + 1, r); 7u!i)<pn
else ){|Bh3XV
insertSort(data, mid + 1, r - mid); *.0}3
1MH[-=[Q
for (i = l; i <= mid; i++) { .v36xXK(
temp = data; _uuxTNN0x*
} \ %Er%yv)
for (j = 1; j <= r - mid; j++) { (c ?OcwTH
temp[r - j + 1] = data[j + mid]; \f6SA{vR|
} %vvA'WG
int a = temp[l]; I @TR|
int b = temp[r]; JzJS?ZF
for (i = l, j = r, k = l; k <= r; k++) { QAigbSn]
if (a < b) { b-8{bP]n
data[k] = temp[i++]; _ji"##K
a = temp; n*6Oa/JG7
} else { cv(9v =](
data[k] = temp[j--]; EELS-qA
b = temp[j]; ,y}?Z8?63
} 7q<2k_3<
} &13qlc6
} @vdBA hXk
'c3P3`o,;
/** UI}v{05]
* @param data xJtblZ1sr
* @param l Z,%^BAJ
* @param i 6]yYiz2Xn
*/ l2"{uCcA
private void insertSort(int[] data, int start, int len) { 96UL](l(`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ")MjR1p
} >4>!zZ
} ld8E!t[
} S>isWte
} !63p?Q=
7U>Xi'?
堆排序： tLXwszR0r
#T1py@b0zA
package org.rut.util.algorithm.support; QFMR~6 ?
F!*u}8/_!
import org.rut.util.algorithm.SortUtil; duCxYhh|
j+He8w-4
/** pj:s+7"t
* @author treeroot ?.d6!vA
* @since 2006-2-2 \ s^a4l2
* @version 1.0 q(sEN!^L`
*/ =e2|:Ba!
public class HeapSort implements SortUtil.Sort{ sdF;H[
T8( \:v
/* (non-Javadoc) (3Hz=k_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R57>z`;
*/ @>n7
public void sort(int[] data) { kR2kV"-l
MaxHeap h=new MaxHeap(); "]\sw"zO?
h.init(data); D#}t)$"
for(int i=0;i h.remove(); n qSjP5
System.arraycopy(h.queue,1,data,0,data.length); ME"B1Se\
} n1+1/
?.tnaE
private static class MaxHeap{ F!DDlYUz.
LT7C>b
void init(int[] data){ -FRMal4Pg0
this.queue=new int[data.length+1]; |[apLQ6
for(int i=0;i queue[++size]=data; h"Qp e'D}
fixUp(size); &[u%ZL
} )Qe<XJH!
} 77D>;90>?
jFbj)!;
private int size=0; ;}v#hKC~
{~J'J$hn8
private int[] queue; w<=?%+n
d:C|laZHn
public int get() { 1t&LNIc|^
return queue[1]; a6\0XVU
} N 4Kj)E@
2d),*Cvf
public void remove() { nn[OC=cDN
SortUtil.swap(queue,1,size--); jeb]3i=pw
fixDown(1); ]-ad\PI$
} c>I(6$
file://fixdown %d-|C.
private void fixDown(int k) { L'(ei7Z
int j; Cngi5._Lb
while ((j = k << 1) <= size) { PkM]jbLe8
if (j < size %26amp;%26amp; queue[j] j++; ^pgVU&-~]/
if (queue[k]>queue[j]) file://不用交换 n~ w.\939@
break; v@m2c_,
SortUtil.swap(queue,j,k); Rq`B'G9|c
k = j; P1cI]rriW
} u!4i+7}
} z~8`xn,
private void fixUp(int k) { JZ=ahSi
while (k > 1) { gY!+x=cx0
int j = k >> 1; P){b"`f
if (queue[j]>queue[k]) $?x;?wS0V
break; :g&9v_}&K{
SortUtil.swap(queue,j,k); s{g^K#BoFi
k = j; R( 2,1f=d
} vwF#;jj\
} ,xcm:;&
KHnq%#
} tqok.h
^w|D^F=o
} SZ$~zT;c
K=Q<G:+&V
SortUtil： dgbqMu"
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package org.rut.util.algorithm; %=w@c
o2'^MxKb T
import org.rut.util.algorithm.support.BubbleSort; {"rYlN7,
import org.rut.util.algorithm.support.HeapSort; {&u`d.Lk2p
import org.rut.util.algorithm.support.ImprovedMergeSort; 2!@ER i
import org.rut.util.algorithm.support.ImprovedQuickSort; 79HKfG2+KB
import org.rut.util.algorithm.support.InsertSort; ZMp5d4y5
import org.rut.util.algorithm.support.MergeSort; g>gVO@"b2
import org.rut.util.algorithm.support.QuickSort; py-5 :g}d
import org.rut.util.algorithm.support.SelectionSort; n1Ic[cM}
import org.rut.util.algorithm.support.ShellSort; #_(t46
C!,|Wi2&
/** )By#({O
* @author treeroot M\m6|P
* @since 2006-2-2 ,a6Oi=+>/U
* @version 1.0 ][D/=-
*/ V^S` d8?
public class SortUtil { G q&[T:
public final static int INSERT = 1; |$^a"Yd`9
public final static int BUBBLE = 2; BYuoeN!
public final static int SELECTION = 3; ^RIDC/B=V6
public final static int SHELL = 4; s?Wkh`b
public final static int QUICK = 5; rjaG{ i
public final static int IMPROVED_QUICK = 6; OYYk[r
public final static int MERGE = 7; au+6ookT
public final static int IMPROVED_MERGE = 8; a ]b%v9
public final static int HEAP = 9; "gIjU~'A
$bo,m2)
public static void sort(int[] data) { \I-bZ|^
sort(data, IMPROVED_QUICK); n0 q$/Y.
} PR+L6DT_
private static String[] name={ zWA~0l.2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l|jb}9(J
}; i3dV2^O
cXDG(.!n7B
private static Sort[] impl=new Sort[]{ ]ykMh
new InsertSort(), =w,cdU*
new BubbleSort(), KtMD?
new SelectionSort(), V#Pz`D
new ShellSort(), d,V]j-
new QuickSort(), RCC~#bb
new ImprovedQuickSort(), bnZ`Wc*5b
new MergeSort(), b<E0|VW
new ImprovedMergeSort(), C@F3iwTtp
new HeapSort() EJByYk
}; M[:},?ah0
[&MhAzF
public static String toString(int algorithm){ -dO9y=?t
return name[algorithm-1]; .9uw@Eq
} >Y)FoHa+/
i w(4!,4~
public static void sort(int[] data, int algorithm) { -]Mbe2;
impl[algorithm-1].sort(data); nW"ml$
} sry`EkS
Om,M8!E
public static interface Sort { w~|z0;hC
public void sort(int[] data); *.P3fVlZ
} (X|`|Y
S(NUuu}S
public static void swap(int[] data, int i, int j) { VT:m!<^
int temp = data; b&g`AnYT
data = data[j]; kN8?.V%Utw
data[j] = temp; x7!YA>
} m&I5~kD
} q% pjY