[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.i.<VD7
} C1hp2CW$5/
int i1=l; Yf1?3(0O
int i2=mid+1; T< D&%)
for(int cur=l;cur<=r;cur++){ ta%yQd7
if(i1==mid+1) u{J$]%C
data[cur]=temp[i2++]; `#R[x7bA1
else if(i2>r) 13kl\<6
data[cur]=temp[i1++]; r[K%8Y8`
else if(temp[i1] data[cur]=temp[i1++]; +JsMYv
else vr"O9L w
data[cur]=temp[i2++]; y2cYRHN[X}
} PY[nnoF"|
} :>f}rq
JD9)Qelw^$
} ZwM(H[iqL
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改进后的归并排序: 1aDx 6Mq
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package org.rut.util.algorithm.support; <- L}N '
-%,=%FBi~4
import org.rut.util.algorithm.SortUtil; Xh+;$2l.B
uVN2}3!)Y
/** ?k@^U9?R
* @author treeroot 3N257]
* @since 2006-2-2 FF#T"y0Y
* @version 1.0 HAwdu1$8
*/ c^3,e/H
public class ImprovedMergeSort implements SortUtil.Sort { g-?@a
4K5
private static final int THRESHOLD = 10; T5|e\<l
$O3.ex V
/* 2ca#@??R
* (non-Javadoc) T[Lz4;TRk5
* 0RgE~x!hI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [4w*<({*
*/ ,<k%'a!B
public void sort(int[] data) { xqs ,4bcbY
int[] temp=new int[data.length]; U$|q]N
mergeSort(data,temp,0,data.length-1); ^hNl6)hR
} 0 30LT$&!
SSxp!E'
private void mergeSort(int[] data, int[] temp, int l, int r) { .do8\
int i, j, k; >dx/k)~~-L
int mid = (l + r) / 2; oR7[[H.4
if (l == r) kMJ}sS
return; 'i',M+0>jC
if ((mid - l) >= THRESHOLD) 4_kY^"*#"
mergeSort(data, temp, l, mid); =^1jVaAL
else v*[UG^+)
insertSort(data, l, mid - l + 1); & .0A%
if ((r - mid) > THRESHOLD) ?Z2`8]-E
mergeSort(data, temp, mid + 1, r); , #=TputM
else zOd*>
insertSort(data, mid + 1, r - mid); P -NR]f
f0vO(@I
for (i = l; i <= mid; i++) { .fbY2b([
temp = data; elAWQEus
} 9u^M{6
for (j = 1; j <= r - mid; j++) { SIapY%)h
temp[r - j + 1] = data[j + mid]; dP?prT
} K[kK8i+(
int a = temp[l]; QEg[
int b = temp[r]; ~Oa$rqu%m
for (i = l, j = r, k = l; k <= r; k++) { eZEk$W%
if (a < b) { fX]`vjM{
data[k] = temp[i++]; r1}^\C
a = temp; "MU-&**
} else { <l(n)|H1P
data[k] = temp[j--]; MA,*$BgZ
b = temp[j]; 9w- )??
} D6Au)1y=&
} .u>[m.
} D%~tU70a
7mq&]4-G
/** m^!:n$
* @param data d\uN
* @param l =WjHf8v;
* @param i LD ]-IX&L
*/ N"}>);r
private void insertSort(int[] data, int start, int len) { Xf_#O'z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Kf1J;*i|\
} {;DAKWm@T
} gu3iaM$W
} 9v_s_QkL2
} ||JUP}eP
4XNheP;b
堆排序： 3l%Qd<
Sp492W+
package org.rut.util.algorithm.support; @>HTbs6W
U xBd14-R_
import org.rut.util.algorithm.SortUtil; <Cv(@A->
i}VF$XN
/** \rFS^#
* @author treeroot HwHF8#D*l
* @since 2006-2-2 .26mB Xr
* @version 1.0 pASX-rb
*/ :D*U4< /u
public class HeapSort implements SortUtil.Sort{ ux<|8S
QkBw59L7
/* (non-Javadoc) 0n{.96r0R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cc|W1,q
*/ Z+&V >
public void sort(int[] data) { eAfi!!Z<
MaxHeap h=new MaxHeap(); d.FU))lmD
h.init(data); rZKfb}ANQ
for(int i=0;i h.remove(); BB6[(Z
System.arraycopy(h.queue,1,data,0,data.length); SLKplLO
} 7v*gwBH
5dm~yQN/
private static class MaxHeap{ V4+|D2
YIg(^>sq
void init(int[] data){ 5tYo! f
this.queue=new int[data.length+1]; }:0_%=)N<
for(int i=0;i queue[++size]=data; @|\9<S
fixUp(size); n9'3~qVZ
} E+aePoU
} 4rU/2}.q
uzBQK
private int size=0; W:_-I4q~
B&]`OO>O
private int[] queue; k7^hcth
/'sv7hg+
public int get() { vqSpF6F q
return queue[1]; JT?u[pQ^
} J8qFdNK
>Uw:cq
public void remove() { QQrldc(I
SortUtil.swap(queue,1,size--); *'>_XX
fixDown(1); A7%d
} Fw 0m(7
file://fixdown F\m^slsu7=
private void fixDown(int k) { pF{jIXu
int j; (BEe^]f
while ((j = k << 1) <= size) { [E1qv;
if (j < size %26amp;%26amp; queue[j] j++; 24 [KGp
if (queue[k]>queue[j]) file://不用交换 =W~7fs
break; rfqwxr45h
SortUtil.swap(queue,j,k); P([!psgu
k = j; YnEyL2SuU
} j%6p:wDl
} Sq5,}oT_{j
private void fixUp(int k) { f/)Y {kS6
while (k > 1) { 2lTt
int j = k >> 1; |'h(S|
if (queue[j]>queue[k]) N3%#JdzZ$
break; _%e8GWf
SortUtil.swap(queue,j,k); y\T$) XGV
k = j; {KG}m'lx
} jZA1fV
} c,a8#Og
QTHY{:Rmu
} K2xB%m1LK
1dN/H)]
} QLJ\>
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SortUtil： Qc7*p]E&
xrf|c
package org.rut.util.algorithm; $MR1 *_\V
dcf,a<K\
import org.rut.util.algorithm.support.BubbleSort; "Hw%@]#
import org.rut.util.algorithm.support.HeapSort; In?rQiD9
import org.rut.util.algorithm.support.ImprovedMergeSort; ?/.])'&b
import org.rut.util.algorithm.support.ImprovedQuickSort; #:?:gY<
import org.rut.util.algorithm.support.InsertSort; C?H~L
import org.rut.util.algorithm.support.MergeSort; Ae2N"%Ej
import org.rut.util.algorithm.support.QuickSort; iHv+I~/
import org.rut.util.algorithm.support.SelectionSort; <V^o.4mOg>
import org.rut.util.algorithm.support.ShellSort; -b!?9T?}
D"4*l5l
/** I bD u+~)
* @author treeroot <-1:o*8:}
* @since 2006-2-2 cxR.:LD}
* @version 1.0 }1 O"?6
*/ ;r@=[h
public class SortUtil { @fA{;@N
public final static int INSERT = 1; `oMZ9Gq2E
public final static int BUBBLE = 2; T={!/y+
public final static int SELECTION = 3; + E{[j
public final static int SHELL = 4; 8=D,`wog
public final static int QUICK = 5; x_3B) &9
public final static int IMPROVED_QUICK = 6; ?b7ttlX{
public final static int MERGE = 7; 9,8/DW.K
public final static int IMPROVED_MERGE = 8; =Htt'""DN
public final static int HEAP = 9; GbLHzw
VP!4Nob
public static void sort(int[] data) { ,|*Gr"Q=
sort(data, IMPROVED_QUICK); T'6`A<`3
} 3/gR}\=
private static String[] name={ O1\4WG%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >)D=PvGlmp
}; |cd"cx+
/[?}LrDO
private static Sort[] impl=new Sort[]{ 8Y-*rpLy
new InsertSort(), e;v"d!H/
new BubbleSort(), R?1Z[N
new SelectionSort(), b"\lF1Nf&o
new ShellSort(), p"P+8"`
new QuickSort(), Q&0`(okb
new ImprovedQuickSort(), &yP|t":HWX
new MergeSort(), u"zR_CzYc
new ImprovedMergeSort(), K Zg NL|
new HeapSort() NU_^*@k
}; ZklO9Ox(
>&\.{ aj
public static String toString(int algorithm){ }J?,?>Z
return name[algorithm-1]; [4xZy5V
} .,6o):
;i.MDW^N
public static void sort(int[] data, int algorithm) { dG+$!*6Z
impl[algorithm-1].sort(data); \5tG>>c i
} y_>DszRN`u
z#Qe$`4&
public static interface Sort { \A^8KVE!
public void sort(int[] data); `StuUa
} -uN{28;@
#)n$Q^9&
public static void swap(int[] data, int i, int j) { eaO'|@;{~
int temp = data; )a0l:jEOc
data = data[j]; i+5Qs-dHA
data[j] = temp; kIa16m
} PZru:.Mh
} <o9i;[+H-