[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]Fb0X
} Bp^LLH
int i1=l; 4/(#masIL
int i2=mid+1; ;%n'k
for(int cur=l;cur<=r;cur++){ p<L7qwOii
if(i1==mid+1) |m's)
data[cur]=temp[i2++]; i@rtt M
else if(i2>r) -}6ew@GE
data[cur]=temp[i1++]; S`s]zdUTP
else if(temp[i1] data[cur]=temp[i1++]; 9y!0WZE{e
else SJiQg-+<Uf
data[cur]=temp[i2++]; PysDDU}v
} |=q~X}DA
} rUKg<]&@
"1a;);S=*)
} !>9s
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改进后的归并排序: QM(xMq
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package org.rut.util.algorithm.support; beOMln+R
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import org.rut.util.algorithm.SortUtil; =;Q/bD->
:ts3_-cr
/** "l&SRX?g
* @author treeroot f/Y&)#g>k
* @since 2006-2-2 l= {Y[T&
* @version 1.0 EDnNS
*/ ZUI6VM
public class ImprovedMergeSort implements SortUtil.Sort { i]MemM-
dXTD8 )&
private static final int THRESHOLD = 10; e|k]te
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/* GQ1/pys
* (non-Javadoc) ;.4y@?B
* Ek<Qz5)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 94B%_
*/ ,>B11Z}PH
public void sort(int[] data) { W`x.qumN
int[] temp=new int[data.length]; s*rR>D:
mergeSort(data,temp,0,data.length-1); 1m5l((d
} {~9zuNi
8&EJ.CQ
private void mergeSort(int[] data, int[] temp, int l, int r) { qt L]x -O
int i, j, k; =2$( tXL
int mid = (l + r) / 2; 1'f_C<.0
if (l == r) >az~0PeEL
return; =w3A{h"^
if ((mid - l) >= THRESHOLD) G' U_I
mergeSort(data, temp, l, mid); T7nI/y
else gGP6"|tc4
insertSort(data, l, mid - l + 1); aL:|Dr3SX
if ((r - mid) > THRESHOLD) gY7sf1\wX
mergeSort(data, temp, mid + 1, r); LcGKYl(\K
else AFi_P\X
insertSort(data, mid + 1, r - mid); :E-$:\V0}k
M0$MK>
for (i = l; i <= mid; i++) { -*7i:mg
temp = data; uzHMQp
} WVR/0l&bU
for (j = 1; j <= r - mid; j++) { (GF}c\=T7
temp[r - j + 1] = data[j + mid]; {}s/p9F4
} i+14!LlI
int a = temp[l]; U5C]zswL
int b = temp[r]; s~{rC{9X
for (i = l, j = r, k = l; k <= r; k++) { _.9 5>`
if (a < b) { |tAkv
data[k] = temp[i++]; XYvj3+
a = temp; 0J+WCm`
} else { V.{HMeE4
data[k] = temp[j--]; n#6{K6}k~
b = temp[j]; GTLS0l)
} ^`!+7!
} Z}t;:yhR
} ow'G&<0b
_GkLspSaU
/** ,f^fr&6jb
* @param data :#g.%&
* @param l Tz)Ku
* @param i 68j1svz9
*/ n{N0S^h
private void insertSort(int[] data, int start, int len) { 7RDmvWd-'?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x1Gx9z9
} |fKT@2(
} 4^r6RS@z
} R[zN?
} WOn<JCh]
/wEl\Kx
堆排序： rG?5z"
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package org.rut.util.algorithm.support; F^/KD<cgK
2V]a+Cgk
import org.rut.util.algorithm.SortUtil; <n,QSy#
6hj[/O)E
/** CJk"yW[,|
* @author treeroot S"*k#ao
* @since 2006-2-2 8XYxyOl
* @version 1.0 ~qZ6I)?
*/ 4L,wBce;,t
public class HeapSort implements SortUtil.Sort{ ftpPrtaP
p0W<K
/* (non-Javadoc) ^.:&ZsqV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &jY| :Fe
*/ >TglX t+
public void sort(int[] data) { @U!&XZ]h
MaxHeap h=new MaxHeap(); {X<g93
h.init(data); &OJ?Za@p@)
for(int i=0;i h.remove(); 1n<4yfJ
System.arraycopy(h.queue,1,data,0,data.length); :rM2G@{
} FS5iUH+5
4!Radl3`
private static class MaxHeap{ ,y'6vW`%g9
s7n7u7$j
void init(int[] data){ oUn+tu:
this.queue=new int[data.length+1]; C-A? mIC
for(int i=0;i queue[++size]=data; [_jw8`
fixUp(size); P>rRD`Yy\
} c/ImK`:)4a
} c$,1j%[)
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private int size=0; :[+8(~| za
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private int[] queue; edo)W mn
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public int get() { .c-a$39
return queue[1]; u5A?; a
} [o#% Eg;
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public void remove() { V#dga5*]
SortUtil.swap(queue,1,size--); h[]9F.[
fixDown(1); t>cGfA
} swF{}S"
file://fixdown \_1a#|97e
private void fixDown(int k) { nf /*n
int j; 4=tR_s
while ((j = k << 1) <= size) { Z71m(//*}
if (j < size %26amp;%26amp; queue[j] j++; ^-Od*DTL
if (queue[k]>queue[j]) file://不用交换 7_i8'(``
break; ~'_cBJ 'XD
SortUtil.swap(queue,j,k); uMg\s\Z
k = j; k|)fl l
} hN'])[+V
} Q>%n&;:
private void fixUp(int k) { q;'f3Y
while (k > 1) { _!',%+
int j = k >> 1; 4 ThFC
if (queue[j]>queue[k]) sApix=Lr
break; EG>?>K_D
SortUtil.swap(queue,j,k); }S/i3$F0~
k = j; &-ropY
} {zFME41>g
} F^O83[S
OH\^j1x9I
} xR1G
=5+*TL`
} "bo0O7InOV
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SortUtil： Tz]R}DKB&
CFaY=Cy
package org.rut.util.algorithm; Y2 @8B6
,'X"(tpu@
import org.rut.util.algorithm.support.BubbleSort; VPUVPq~&
import org.rut.util.algorithm.support.HeapSort; (GSP3KKo*G
import org.rut.util.algorithm.support.ImprovedMergeSort; s*izhjjX
import org.rut.util.algorithm.support.ImprovedQuickSort; 1-_r\sb
import org.rut.util.algorithm.support.InsertSort; 3 t,_{9
import org.rut.util.algorithm.support.MergeSort; ^po@U"
import org.rut.util.algorithm.support.QuickSort; "%-Vrb=:Y
import org.rut.util.algorithm.support.SelectionSort; YFO{i-*q
import org.rut.util.algorithm.support.ShellSort; S&-K!XyJ
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/** JVE\{ e)
* @author treeroot A]z*#+Sl
* @since 2006-2-2 K;?D^n.
* @version 1.0 .Bm%
*/ g*Y,.
public class SortUtil { 6Z2,:j;
public final static int INSERT = 1; N^Re
public final static int BUBBLE = 2; Z>rY9VvWD
public final static int SELECTION = 3; :L[>!~YG_n
public final static int SHELL = 4; 6%v9o?:~l
public final static int QUICK = 5; 4<efj
public final static int IMPROVED_QUICK = 6; AYts &+
public final static int MERGE = 7; h@:K=ggK
public final static int IMPROVED_MERGE = 8; :KLXrr
public final static int HEAP = 9; "/W[gP[y%
)g0fN+Mb
public static void sort(int[] data) { M;(,0dk
sort(data, IMPROVED_QUICK); ]R__$fl`8
} xUo6~9s7
private static String[] name={ +a1x;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^t;z;.g
}; (Fv tL*
wVf~FssN
private static Sort[] impl=new Sort[]{ ahBqYAK9
new InsertSort(), w0pMH p'Y
new BubbleSort(), zkQ[<
new SelectionSort(), 7>vm?a^D2&
new ShellSort(), rqdwQ
new QuickSort(), ^J!q>KJs
new ImprovedQuickSort(), x(_[D08/TT
new MergeSort(), t}EMX9SQ
new ImprovedMergeSort(), Ui{%q@
new HeapSort() ]Bw0Qq F#
}; IK~&`n](>
-N *L1Zj
public static String toString(int algorithm){ em$pU*`P
return name[algorithm-1]; QrZ#<{,J5
} bF)G+IH
nB[-KS
public static void sort(int[] data, int algorithm) { 2G8pDvBr
impl[algorithm-1].sort(data); jN=<dq ~
} tYS4"Nfb+
+n3I\7G>
public static interface Sort { nQ%HtXt;
public void sort(int[] data); ]BQYVx/
} {7o#Ve
Mf}M/Fh
public static void swap(int[] data, int i, int j) { D7Q+w
int temp = data; NE995;
data = data[j]; z\YIwrq3*
data[j] = temp; /@os*c|je
} J 3!~e+wn
} R[WiW RfD