[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; ;x=r.3OQy
} }qhNz0*
int i1=l; 1FQ_`wF4
int i2=mid+1; auKGm:
for(int cur=l;cur<=r;cur++){ NEG&zf
if(i1==mid+1) CF?TW
data[cur]=temp[i2++]; 31@m36? X
else if(i2>r) uY~xHV_-
data[cur]=temp[i1++]; v%%;Cp73
else if(temp[i1] data[cur]=temp[i1++]; XdR^,;pWE
else [C TR8
data[cur]=temp[i2++]; OY>0qj
} 'K0=FPB/@
} 4M4oI .
hz8Z)xjJ V
} 3+v+_I>%k
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改进后的归并排序: l~v BA$,
D>~S-]
package org.rut.util.algorithm.support; \X?GzQkr
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import org.rut.util.algorithm.SortUtil; ^%:syg_RM[
==z,vxr
/** ;:)?@IuSy
* @author treeroot &InMI#0mV
* @since 2006-2-2 9 yE
* @version 1.0 gU^2;C
*/ j;+!BKWy4
public class ImprovedMergeSort implements SortUtil.Sort { Ea7LPHE#
4xE [S
private static final int THRESHOLD = 10; STxreW1
(Z72 3)
/* AX= 4{b'
* (non-Javadoc) TT0~41&l
* 1-=zSWmyK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) edW:(19}
*/ Z} 8m]I
public void sort(int[] data) { 0f<$S$~h
int[] temp=new int[data.length]; ee=d*)
mergeSort(data,temp,0,data.length-1); <&$:$_ah
} mq(*4KFWJ2
YdI&OzaroE
private void mergeSort(int[] data, int[] temp, int l, int r) { ]1XJQW@gF
int i, j, k; H)${"
int mid = (l + r) / 2; IO4 8sV }
if (l == r) < x==T4n/
return; 34$qV{Y%y
if ((mid - l) >= THRESHOLD) Lb>UraUvL
mergeSort(data, temp, l, mid); $M(ZKS3,j
else R3dCw:\O+Z
insertSort(data, l, mid - l + 1); FojsI<
if ((r - mid) > THRESHOLD) # [0>wEq
mergeSort(data, temp, mid + 1, r); nd 5w|83
else !AGjiP$
insertSort(data, mid + 1, r - mid); E2D}F@<]
h 'F\9t
for (i = l; i <= mid; i++) { ny.YkN2
temp = data; #<\A[Po
} dt efDsK
for (j = 1; j <= r - mid; j++) { > $#v\8
temp[r - j + 1] = data[j + mid]; _Zq2 <:
} @sV6g?{tI
int a = temp[l]; 9z:P#=Q:
int b = temp[r]; y^SDt3Am
for (i = l, j = r, k = l; k <= r; k++) { '{t&!M`
if (a < b) { }Z~& XL=
data[k] = temp[i++]; q i27:oJ
a = temp; -Xw i}/OX
} else { QE.a2 }
data[k] = temp[j--]; B-<H8[GkG1
b = temp[j]; PJCRvs|X
} V_SZp8
} i8tH0w/(M
} v$H]=y
ft"B,
/** ftqi>^i
* @param data 2bB&/Uumsd
* @param l *c[X{
* @param i XSu9C zx&I
*/ #SzCd&hI
private void insertSort(int[] data, int start, int len) { <L72nwcK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "s6O|=^*
} 42Gv]X
} ]y3'6!
} 6uU2+I
} TzCNY@y
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堆排序： BAq@H8*B
3+%c*}KC~
package org.rut.util.algorithm.support; "2}E ARa
j^g^=uau
import org.rut.util.algorithm.SortUtil; Z5vpo$l
YB}p`b42L
/** ]Y%?kQ^
* @author treeroot 6n 2LG
* @since 2006-2-2 !i|]OnJY
* @version 1.0 ZS-O,[
*/ 5F8sigr/h
public class HeapSort implements SortUtil.Sort{ bOi`JJ^
{!B^nCSL
/* (non-Javadoc) aK%i=6j!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m|RA@sY%`
*/ p.gaw16}>
public void sort(int[] data) { gX}(6RP_!
MaxHeap h=new MaxHeap(); -L&FguoVB
h.init(data); U-P\F-
for(int i=0;i h.remove(); qw!_/Z3[
System.arraycopy(h.queue,1,data,0,data.length); 7,sslf2%K
} FE)L?
(5SN=6O
private static class MaxHeap{ G|Du/XYh
*o/Q#
void init(int[] data){ \`|*i$
this.queue=new int[data.length+1]; A&$oiLc
for(int i=0;i queue[++size]=data; `g;`yJX<
fixUp(size); H)s$0Xd
} L y!!+UM\
} 8H>: C(h
_pXy}D
private int size=0; Z|FWQ8gZ4m
8TK&i,
private int[] queue; u |hT1l
^_5Nh^
public int get() { .,C8ASfh
return queue[1]; SWX;sM
} 9`/\|t|V
^<0azza/(
public void remove() { Lh%>> Ht{
SortUtil.swap(queue,1,size--); }*2q7K2bj
fixDown(1); piRP2Lbm*
} p&nIUx"
file://fixdown !,mv 7Yj
private void fixDown(int k) { 1k5o?'3&
int j; YGBVGpE9
while ((j = k << 1) <= size) { 3w=OvafT:
if (j < size %26amp;%26amp; queue[j] j++; @ (UacFO
if (queue[k]>queue[j]) file://不用交换 7*e7P[LQU
break; A~CQ@
SortUtil.swap(queue,j,k); IAD_Tck
k = j; 3H0~?z_
} 9Blc
} : kVEB<G
private void fixUp(int k) { .c[v /SB]
while (k > 1) { MCOz-8@|Y
int j = k >> 1; =R08B)yR
if (queue[j]>queue[k]) Rw$>()}H8
break; !$&3h-l[
SortUtil.swap(queue,j,k); Z7<N<
k = j; ;:nO5VFOg
} t7rz]EN
} }c>[m,lz
D\~*| J
} RcUKe,
T@[(FVA N
} OY'490
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SortUtil： \($EYhx
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package org.rut.util.algorithm; o2cZ
k%iZ..
import org.rut.util.algorithm.support.BubbleSort; C:77~f-+rQ
import org.rut.util.algorithm.support.HeapSort; 9/rX%
import org.rut.util.algorithm.support.ImprovedMergeSort; uTNmt]
import org.rut.util.algorithm.support.ImprovedQuickSort; ;?/v}$Pa
import org.rut.util.algorithm.support.InsertSort; Ou~|Q&f'
import org.rut.util.algorithm.support.MergeSort; qB`zyd8yu
import org.rut.util.algorithm.support.QuickSort; g?qh
import org.rut.util.algorithm.support.SelectionSort; O`nrXC{
import org.rut.util.algorithm.support.ShellSort; <lHelX=/
V9:h4]
/** ,t4g^67R{
* @author treeroot Sri,sZv
* @since 2006-2-2 7/.-dfEK
* @version 1.0 u:+wuyu
*/ aB9Pdut
public class SortUtil { ?UAB}CjY
public final static int INSERT = 1; IfHB+H
public final static int BUBBLE = 2; /n= %#{
public final static int SELECTION = 3; iyw"|+
public final static int SHELL = 4; (>THN*i
public final static int QUICK = 5; WH F>J
public final static int IMPROVED_QUICK = 6; qRMH[F$`
public final static int MERGE = 7; t'@1FA!)
public final static int IMPROVED_MERGE = 8; {'W\~GnZ
public final static int HEAP = 9; *@J
<(Ub(
public static void sort(int[] data) { >;S/$
sort(data, IMPROVED_QUICK); zbt>5S_
} n>F1G MX
private static String[] name={ R v61*F4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YYFJJ,7?
}; JO:40V?op
k^3|A3A
private static Sort[] impl=new Sort[]{ `3!ERQU
new InsertSort(), 9QaEUy*,
new BubbleSort(), ,Mf@I5?
new SelectionSort(), [gZd$9a
new ShellSort(), D*d@<&Bl4<
new QuickSort(), -(FVTWi0
new ImprovedQuickSort(), \BC|`)0h
new MergeSort(), h>,yqiY4p
new ImprovedMergeSort(), "j5b$T0P>
new HeapSort() @q9uU9c
}; jq{rNxdGx
,^MA,"8
public static String toString(int algorithm){ gd>Op
return name[algorithm-1]; |r"1 &ow5
} %C*oy$.
PJu)%al
public static void sort(int[] data, int algorithm) { yZ t}Jnv
impl[algorithm-1].sort(data); "|{O%X
} pqPhtWi%PJ
xXl^\?HC
public static interface Sort { ~8AcW?4Z
public void sort(int[] data); Gd$odKtI
} +:4J~Cuf
1<_i7.{k
public static void swap(int[] data, int i, int j) { EB'(%dH
int temp = data; tp2CMJc{L
data = data[j]; ;\=W=wL(
data[j] = temp; D T^3K5
} Ilvz@=
} oXG,8NOdC