[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; 9:4S[mz/hD
} w.w{L=p:<"
int i1=l; x)*Lu">
int i2=mid+1; 72d|Jbd
for(int cur=l;cur<=r;cur++){ &RYdSXM
if(i1==mid+1) V\Gs&>
data[cur]=temp[i2++]; @JXpD8jn
else if(i2>r) O\.^H/
data[cur]=temp[i1++]; %h@1lsm1+
else if(temp[i1] data[cur]=temp[i1++]; F|eWHw?t
else 'KA$^
data[cur]=temp[i2++]; 4?1Qe\A^
} '";#v.!
} ?).;cG:<
?)|}gr
} <4LJ#Fx
^T!Zz"/:
改进后的归并排序: ,_u7@Ix
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package org.rut.util.algorithm.support; .p! DVQ"a
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import org.rut.util.algorithm.SortUtil; (O{OQk;CF
*rmC3'}s
/** ?4%H(k5A
* @author treeroot [(@K;6o
* @since 2006-2-2 -y-}g[`
* @version 1.0 3A!a7]fW
*/ >O?WRCB
public class ImprovedMergeSort implements SortUtil.Sort { `Y:]&w
5P\>$N1p
private static final int THRESHOLD = 10; (M$0'BV0
s{@R|5
/* a2B71RT~
* (non-Javadoc) 4W"A*A
* \1!Q.V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %`C*8fc&
*/ M5h r0R{
public void sort(int[] data) { 7A\`
int[] temp=new int[data.length]; Zu,:}+niU
mergeSort(data,temp,0,data.length-1); xRD+!3
} ;[::&qf
?Z 2,?G
private void mergeSort(int[] data, int[] temp, int l, int r) { iSCkV2
int i, j, k; `-uE(qp
int mid = (l + r) / 2; ^wolY0p
if (l == r) S/XU4i:aV
return; aDdGhB
if ((mid - l) >= THRESHOLD) \Ip)Lm0
mergeSort(data, temp, l, mid); W_2;j)i
else oRCc8&
insertSort(data, l, mid - l + 1); 'nq=xi@RC
if ((r - mid) > THRESHOLD) >BbX:
mergeSort(data, temp, mid + 1, r); gS'{JZu2
else 9,'m,2%W
insertSort(data, mid + 1, r - mid); Qb^G1#r@C
$Aw@xC^!
for (i = l; i <= mid; i++) { f\hMTebma$
temp = data; JJd qdX;
} %*gf_GeM
for (j = 1; j <= r - mid; j++) { J=^IS\m
temp[r - j + 1] = data[j + mid]; =:&xdphZ+
} .J75bX5
int a = temp[l]; b]]8Vs)'
int b = temp[r]; J#..xJ?XRD
for (i = l, j = r, k = l; k <= r; k++) { i\6CE|
if (a < b) { DEZww9T2Qs
data[k] = temp[i++]; {nV/_o$$
a = temp; 49; 'K
} else { lAU99(GXV
data[k] = temp[j--]; .rtA sbp.!
b = temp[j]; L~6%Fi&n4
} \C3I6Qx
} XYo,5-
} !kE5]<H\
P$obID
/** `DY yK?R
* @param data ,s~l; Gkj
* @param l n4kq=Z%
* @param i ^!1!l-
*/ ">bhxXeiN
private void insertSort(int[] data, int start, int len) { ZIx-mC5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P4[kW}R
} >$ZG=&
} mw 28E\U
} I`0-q?l
} cj[b^Wv:
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堆排序： `*8}q!.
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package org.rut.util.algorithm.support; )aIcA
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import org.rut.util.algorithm.SortUtil; DO:,PZX
J9mK9{#q
/** <T_3s\
* @author treeroot bTD?uX!^@
* @since 2006-2-2 cT'Bp)a
* @version 1.0 XGSFG~d
*/ 072C!F
public class HeapSort implements SortUtil.Sort{ }:#WjH^
LL(xi )
/* (non-Javadoc) 8S1@,O,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pp_4B
*/ 7S{qo&j'
public void sort(int[] data) { P-\f-FS
MaxHeap h=new MaxHeap(); -+WAaJ(b
h.init(data); {zb'Z Yz
for(int i=0;i h.remove(); cZh0\DyU
System.arraycopy(h.queue,1,data,0,data.length); *kLFs|U
} /L^g. ~
b&rBWp0#
private static class MaxHeap{ ps{4_V-3u
K}l3t2uk
void init(int[] data){ = 7y-o
this.queue=new int[data.length+1]; yLC[-.H
for(int i=0;i queue[++size]=data; |o5eG><
fixUp(size); [inlxJD
} ?Y~t{5NJR
} DhM=q
Z 8rD9 k$6
private int size=0; *I]]Ogpq=
ftYJ 3/WH
private int[] queue; O*:87:I d
Wu][A\3D1
public int get() { ZE=sw}=
return queue[1]; +KTfGwKt
} 7%^G]AFi
JH.XZM&
public void remove() { P)Adb~r
SortUtil.swap(queue,1,size--); SxRJ{m~
fixDown(1); j[r}!;O
} -$Fj-pO\
file://fixdown J8:s=#5
private void fixDown(int k) { C7%R2>}?f
int j; tRoSq;VrS
while ((j = k << 1) <= size) { c]9gf\WW
if (j < size %26amp;%26amp; queue[j] j++; Zy(i_B-b
if (queue[k]>queue[j]) file://不用交换 V"#0\|]m
break; =7Ud-5c
SortUtil.swap(queue,j,k); J>_mDcPo
k = j; !K-1tp$
} $nE{%?n-#
} =0cTct6\
private void fixUp(int k) { OR@ 67Y
while (k > 1) { 9kD#'BxC
int j = k >> 1; 8T3,56>
if (queue[j]>queue[k]) g6Vkns4
break; S\:^#Yi`
SortUtil.swap(queue,j,k); 1-gM)x{Jr
k = j; ]K(a32VCH
} ,j%\3g`
} QEJu.o
oZ%uq78#[%
} &hWELZe0vv
b-&rMML
} 07.p {X R
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SortUtil： eHgr"f*7
CF;Gy L1M
package org.rut.util.algorithm; {I{ 0rV
3WwS+6R
import org.rut.util.algorithm.support.BubbleSort; Dge#e
import org.rut.util.algorithm.support.HeapSort; >6C\T@{lJ
import org.rut.util.algorithm.support.ImprovedMergeSort; 5=TgOS]R
import org.rut.util.algorithm.support.ImprovedQuickSort; r8m}B#W7
import org.rut.util.algorithm.support.InsertSort; a OmG,+o
import org.rut.util.algorithm.support.MergeSort; J*zzjtY( 1
import org.rut.util.algorithm.support.QuickSort; d'_q9uf'
import org.rut.util.algorithm.support.SelectionSort; l+Wux$6U
import org.rut.util.algorithm.support.ShellSort; $J6 .0O
pz^S3fy
/** 1clzDwW
* @author treeroot \n_7+[=E
* @since 2006-2-2 ='"Yj
* @version 1.0 1GN^uia7
*/ FF8jW1
public class SortUtil { \m7\}Nbz0/
public final static int INSERT = 1; 3/RwCtc
public final static int BUBBLE = 2; )?jFz'<r
public final static int SELECTION = 3; 2*g2UP
public final static int SHELL = 4; =Z+^n ?"
public final static int QUICK = 5; 2O kID WcM
public final static int IMPROVED_QUICK = 6; !~E/Rp
public final static int MERGE = 7; IOFXkpKR
public final static int IMPROVED_MERGE = 8; ]xvA2!)Q
public final static int HEAP = 9; I$"Z\c8;
.F ?ww}2p]
public static void sort(int[] data) { u$JAjA
sort(data, IMPROVED_QUICK); "Da1BuX\
} T, #-: }
private static String[] name={ Vg$d|m${
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F+*E}QpM
}; 6[t<g=
\6 \bD<
private static Sort[] impl=new Sort[]{ L\4rvZa
new InsertSort(), 8O^x~[sQ
new BubbleSort(), >M5}L<
new SelectionSort(), f,O10`4s
new ShellSort(), J^"_H:1[
new QuickSort(), *9n[#2sM<
new ImprovedQuickSort(), IgbuMEfL
new MergeSort(), 'fn}I0Vc
new ImprovedMergeSort(), t]&.'n,
new HeapSort() j)@W1I]2#
}; Ny"9!3V
l4RqQ+[KA;
public static String toString(int algorithm){ X0j\nXk
return name[algorithm-1]; P"7` :a
} x)?V{YAL
n~0wq(8M
public static void sort(int[] data, int algorithm) { />xEpR3_A
impl[algorithm-1].sort(data); a@? $#>
} F.TIdkvp
8fQ~UcT$
public static interface Sort { Gm- "?4(
public void sort(int[] data); fS}Eu4Xe
} ](oeMl18R
<~|n}&
public static void swap(int[] data, int i, int j) { #s~ITG#H
int temp = data; 7O)ATb#up
data = data[j]; }6l:'nW
data[j] = temp; Xf;!w:u
} :+YHj)mN
} TD\TVK3P