[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; 9IfmW^0
} ;))+>%SGCt
int i1=l; c9u`!'g`i
int i2=mid+1; l4YJ c
for(int cur=l;cur<=r;cur++){ {@{']Y
if(i1==mid+1) Vaw+.sG`AP
data[cur]=temp[i2++]; mnX2a
else if(i2>r) :KP@RZm
data[cur]=temp[i1++]; FbFPJ !fb
else if(temp[i1] data[cur]=temp[i1++]; 37.S\gO]
else K;H&n1
data[cur]=temp[i2++]; +.FEq*V
} E]n&=\
} s)D;a-F
,Ah;A[%?~
} FHg 9OI67
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改进后的归并排序: D.u{~
mL{6L?
package org.rut.util.algorithm.support; vw/J8'
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import org.rut.util.algorithm.SortUtil; G}raA%
|3"KK
/** +lcbi
* @author treeroot )}Kf=
* @since 2006-2-2 #r\4sVg
* @version 1.0 .|fHy
*/ Y)2,PES=
public class ImprovedMergeSort implements SortUtil.Sort { p]+Pkxz]'
>@_^fw)
private static final int THRESHOLD = 10; pO3SUOP
Kn;"R:
/* rw JIx|(
* (non-Javadoc) SZ'R59Ee<
* jLm ;ty2;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .[OUI
*/ oAeUvmh
public void sort(int[] data) { 2uW; xfeY
int[] temp=new int[data.length]; Fk7')?
mergeSort(data,temp,0,data.length-1); Am|%lj+1z
} aeM+ d`f
Om2d.7S
private void mergeSort(int[] data, int[] temp, int l, int r) { ?NsW|w_
int i, j, k; WP'!*[z
int mid = (l + r) / 2; '_FsvHQ
if (l == r) 0GCEqQy8
return; -C]5>& W
if ((mid - l) >= THRESHOLD) bK&+5t&
mergeSort(data, temp, l, mid); GGs}i1m
else fr6fj
insertSort(data, l, mid - l + 1); ;[OH(!
if ((r - mid) > THRESHOLD) &}B|"s[
mergeSort(data, temp, mid + 1, r); [sjosV
else 4!no~ $b
insertSort(data, mid + 1, r - mid); Q/0Tj]D
7;wd(8
for (i = l; i <= mid; i++) { . 3T3EX|G
temp = data; ( ^Nz9{
} )Y{L&A
for (j = 1; j <= r - mid; j++) { +',S]Edx
temp[r - j + 1] = data[j + mid]; +#@I~u _}D
} W.KDVE$}f
int a = temp[l]; K1yzD6[eW
int b = temp[r]; /@TF5]Ri
for (i = l, j = r, k = l; k <= r; k++) { je=a/Y=%U{
if (a < b) { 'I6i,+D/q
data[k] = temp[i++]; z<XtS[ki
a = temp; )1`0PJoHE
} else { w_K1]<Q*
data[k] = temp[j--]; .p" xVfi6
b = temp[j]; $DaNbLV
} r52gn(,
} 6mxfLlZ
} ; )@~
_F|Ek;y%
/** (gWm,fI RZ
* @param data 1^JS Dd
* @param l cU!vsdR3
* @param i [5Mr@f4I
*/ ~U&AI1t+J
private void insertSort(int[] data, int start, int len) { d|Lj~x|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4O!ikmY:t
} 12gU{VD
} S9FE
} .Rs^YZF
} H8}oIA"b
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堆排序： $}<e|3_
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package org.rut.util.algorithm.support; MeZf*' J
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import org.rut.util.algorithm.SortUtil; u>a5GkG.
<$Yd0hxjU
/** Ry6@VQ"NLb
* @author treeroot {8bSB.?R
* @since 2006-2-2 59;KQ
* @version 1.0 wgGl[_)
*/ Y\g3hM
public class HeapSort implements SortUtil.Sort{ vy:Z/1q
U-tTW*[1]
/* (non-Javadoc) }a(dyr`S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <bEbweQrgm
*/ N6i Q8P-
public void sort(int[] data) { R%[ c;i
MaxHeap h=new MaxHeap(); ,/|T-Ka
h.init(data); m#\dSl}
for(int i=0;i h.remove(); {V CWn95Z
System.arraycopy(h.queue,1,data,0,data.length); )irEM
} ml }{|Yz
z9Rp`z&`E
private static class MaxHeap{ 3eQ&F~S
`*1p0~cu
void init(int[] data){ AFE~ v\Gz
this.queue=new int[data.length+1]; d<P\&!R(
for(int i=0;i queue[++size]=data; NyNXP_8
fixUp(size); ' %o#q6O
} WX3-\Y5E
} O)r4?<Q
WOL:IZX%
private int size=0; sdw(R#GE
cTTL1SW
private int[] queue; {kR#p %E]
> /caXvS
public int get() { )bscBj@
return queue[1]; ][Rh28?I{
} R~q]JSIC@
|Ds1
public void remove() { -m~#Bq
SortUtil.swap(queue,1,size--); PALc;"]O
fixDown(1); :,6\"y-
} >}6%#CAf
file://fixdown draN0vf
private void fixDown(int k) { &6nWzF
int j; ~oY^;/ j
while ((j = k << 1) <= size) { \z(gqkc 6
if (j < size %26amp;%26amp; queue[j] j++; ?^\|-Gr
if (queue[k]>queue[j]) file://不用交换 Z"fJ`--
break; .U]-j\
SortUtil.swap(queue,j,k); 49HZ2`Y
k = j; pIqeXY
} c'yxWZEv
} C1 *v,i
private void fixUp(int k) { r3UUlR/Do
while (k > 1) { ln dx"prW
int j = k >> 1; ^^D0^k!R
if (queue[j]>queue[k]) F0@gSurg)
break; k\?Ii<m
SortUtil.swap(queue,j,k); &0JI!bR(
k = j; n/mG|)Xt
} Lt>IX")
} JDT`C2-Q
P@c5pc#|
} aAUvlb
8FY?!C
} .,6-u
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SortUtil： P\k# >}}
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package org.rut.util.algorithm; ;u)I\3`*!
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import org.rut.util.algorithm.support.BubbleSort; |@4' <4t
import org.rut.util.algorithm.support.HeapSort; g]0_5?i
import org.rut.util.algorithm.support.ImprovedMergeSort; sd|).;s}
import org.rut.util.algorithm.support.ImprovedQuickSort; 1p=]hC
import org.rut.util.algorithm.support.InsertSort; qY!Zt_Be6
import org.rut.util.algorithm.support.MergeSort; HN|%9{VeB
import org.rut.util.algorithm.support.QuickSort; 5$C-9
import org.rut.util.algorithm.support.SelectionSort; 11;MN
import org.rut.util.algorithm.support.ShellSort; #AQV(;r7@
/IMFO:c
/** $qj2w"'
* @author treeroot I b5rqU\
* @since 2006-2-2 Ig>(m49d
* @version 1.0 Er?&Y,o
*/ /%io+94
public class SortUtil { C;^X[x%h7$
public final static int INSERT = 1; ~Z'?LV<t
public final static int BUBBLE = 2; fI|Nc
public final static int SELECTION = 3; 4'=y:v2
public final static int SHELL = 4; Z4ImV~m
public final static int QUICK = 5; l+^*LqEW2
public final static int IMPROVED_QUICK = 6; {"KMs[M
public final static int MERGE = 7; 7-fb.V9
public final static int IMPROVED_MERGE = 8; }@d@3
public final static int HEAP = 9; * r7rZFS
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public static void sort(int[] data) { '6%2.[o
sort(data, IMPROVED_QUICK); `e}B2;$A3
} K]w'&Qm8W
private static String[] name={ "3Y0`&:D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ey$&;1x#5
}; 6.yu-xm
x7 ,5
private static Sort[] impl=new Sort[]{ |P?*5xPB
new InsertSort(), `r 3
new BubbleSort(), jAlv`uB|G"
new SelectionSort(), ; BHtCuY
new ShellSort(), -aCKRN85
new QuickSort(), O?#7N[7
new ImprovedQuickSort(), b@hqz!)l`
new MergeSort(), '!B&:X)
new ImprovedMergeSort(), J5,9_uo]
new HeapSort() 7s^'d,P
}; X 0+vXz{~g
{]4LULq
public static String toString(int algorithm){ sK?twg;D*|
return name[algorithm-1]; l+0oS'`V*L
} BnF^u5kv%
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public static void sort(int[] data, int algorithm) { Nu)NqFG,
impl[algorithm-1].sort(data); <lJ345Q
} l9Q-iJ
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public static interface Sort { (X*^dO
public void sort(int[] data); 1T n}
} ?(_08O
QQc -Ya!v
public static void swap(int[] data, int i, int j) { 1EX;MW-p<T
int temp = data; E}Uc7G
data = data[j]; QS;f\'1bb
data[j] = temp; +]{G@pn
} &s>Jb?_5Mx
} S)"Jf?