[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; 3Db3xN
} ~P-*}q2J
int i1=l; B/J&l
int i2=mid+1; |2`"1gt
for(int cur=l;cur<=r;cur++){ T#!lPH :&h
if(i1==mid+1) T;\^#1
data[cur]=temp[i2++]; C}?0`!Cc%
else if(i2>r) p<`+sf}A:
data[cur]=temp[i1++]; [4+q+
else if(temp[i1] data[cur]=temp[i1++]; 3+xy4G@L
else fd8!KO
data[cur]=temp[i2++]; VW@ x=m
} p T[gdhc
} 1%J.WH6eQ
?0<w
} ogeL[7
h?UVDzI!O
改进后的归并排序: a :HNg
V5D2\n3A
package org.rut.util.algorithm.support; wP"q<W g
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import org.rut.util.algorithm.SortUtil; TNY4z(r
*zVvQ=
/** u-DK_^v4M
* @author treeroot (0Naf
* @since 2006-2-2 J?n<ydZSH
* @version 1.0 Qbeeq6
*/ zzZg$9PT[
public class ImprovedMergeSort implements SortUtil.Sort { ]M,06P>?
wk\L*\@Y}
private static final int THRESHOLD = 10; %do1i W
{.k)2{
/* (A/0@f1#
* (non-Javadoc) S<6k0b(,_3
* S{p}ux[}=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .dq "k
*/ N<JHjq
public void sort(int[] data) { vz`@x45K
int[] temp=new int[data.length]; 59B&2861
mergeSort(data,temp,0,data.length-1); tkuc/Z/@
} Xt,X_o2m|]
rOl6lQW
private void mergeSort(int[] data, int[] temp, int l, int r) { en9en=n|
int i, j, k; kI*UkM-
int mid = (l + r) / 2; J\W-dI
if (l == r) K]N~~*`%`
return; P#G.lft"O
if ((mid - l) >= THRESHOLD) s`>H
mergeSort(data, temp, l, mid); Q!CO0w
else Ly(P=M>"y
insertSort(data, l, mid - l + 1); @R:#"
if ((r - mid) > THRESHOLD) f\ "`7
mergeSort(data, temp, mid + 1, r); <fM>Yi5
else 9Z!lmfnJ
insertSort(data, mid + 1, r - mid); ^Gz{6@TY5
&v#`t~
for (i = l; i <= mid; i++) { 6w#nkF
temp = data; DBbc|I/[l
} LXhaD[1Rb
for (j = 1; j <= r - mid; j++) { Qp:6=o0:
temp[r - j + 1] = data[j + mid]; d$1#<-yP
} Etmo78e
int a = temp[l]; UR>_)*
int b = temp[r]; sp8[cO=
for (i = l, j = r, k = l; k <= r; k++) { 0B3 QVbp'
if (a < b) { fwmLJ5o N
data[k] = temp[i++]; 9[>Lp9l'
a = temp; Xt(! a
} else { ySruAkw%
data[k] = temp[j--]; I}:L]H{E
b = temp[j]; %{ ~>n"
} 3sC:jIp
} kfpm=dKL
} %yw=[]Vjze
8[\79|
/** O@`J_9
* @param data t*z'c
* @param l 5upShtC
* @param i 4%bTj,H#
*/ Hptq,~_t
private void insertSort(int[] data, int start, int len) { [y{E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {a4xF2
} 7jezw'\=~
} )l2P}k7`
} `Yogq)G}
} -c$z 2Q)
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堆排序： FrR9{YTA.
j7sU0"7^
package org.rut.util.algorithm.support; OPJgIU%
C5B=NAc
import org.rut.util.algorithm.SortUtil; Dh8(HiXf:
-M`D>
/** CveWl$T12
* @author treeroot /Hk07:"c
* @since 2006-2-2 ;E2kT GT
* @version 1.0 {_ 6t4h}
*/ =dn1}
public class HeapSort implements SortUtil.Sort{ c9|a$^I6
vcOsq#UW
/* (non-Javadoc) B}k'@;G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 77_g}N
*/ ;siJ~|6)
public void sort(int[] data) { b7f0#*(?
MaxHeap h=new MaxHeap(); 0Q*-g}wXfS
h.init(data); j/`Up
for(int i=0;i h.remove(); US]"4=Zm
System.arraycopy(h.queue,1,data,0,data.length); 49y*xMn
} 7BrV<)ih{*
5\+EHW!o
private static class MaxHeap{ 45r|1<Ro
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void init(int[] data){ X o_] v
this.queue=new int[data.length+1]; ;:^ Lv
for(int i=0;i queue[++size]=data; 1bDJ}M~]z
fixUp(size); \SzGzCJ
} t_Z _!Qy
} >~>{;Wq(p+
dWIZ37w+D
private int size=0; Ku&*`dME
{SHqW5VX
private int[] queue; /9TL&_A-T
N7+#9S5fv
public int get() { jXH0BPa,
return queue[1]; d"p2Kx'*3
} xtu]F
n1JC?+
public void remove() { UJ9q-r
SortUtil.swap(queue,1,size--); dRM5urR6,
fixDown(1); sk\_[p
} 0JrK/Ma3
file://fixdown AAdD\%JZ
private void fixDown(int k) { _p$"NNFN
int j; HcDyD0;L.
while ((j = k << 1) <= size) { t0I>5#*WU
if (j < size %26amp;%26amp; queue[j] j++; u& AQl.u
if (queue[k]>queue[j]) file://不用交换 kkHTbn=!
break; t{[gKV-b
SortUtil.swap(queue,j,k); 7s$6XO!
k = j; gRw.AXRa
} ZtKQ]jV&@
} dqL-'
private void fixUp(int k) { KWtu,~O_u
while (k > 1) { Sn+FV+D
int j = k >> 1; u% r!?-z
if (queue[j]>queue[k]) nh?9R&
break; 4*YOFU}l
SortUtil.swap(queue,j,k); L;4[ k;5
k = j; *EX$v4BX
} 1Q0%7zRirI
} ;7wwY$PBH
;!^ +N
} ./';P<)
(v|ixa
} p"g1V7B
D8q3TyCj%
SortUtil： Rd .U;>
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package org.rut.util.algorithm; )A"ZV[eOoQ
XX*'N+
import org.rut.util.algorithm.support.BubbleSort; 8H&_,;
import org.rut.util.algorithm.support.HeapSort; Y>(ZsHu
import org.rut.util.algorithm.support.ImprovedMergeSort; -qs(2^
import org.rut.util.algorithm.support.ImprovedQuickSort; d?Ia#K93G
import org.rut.util.algorithm.support.InsertSort; Dl>*L
import org.rut.util.algorithm.support.MergeSort; :h^O{"au^
import org.rut.util.algorithm.support.QuickSort; [vZfH!vLP
import org.rut.util.algorithm.support.SelectionSort; u'#`yTB6b
import org.rut.util.algorithm.support.ShellSort; wxH(&CB-{
|E"Xavi>
/** DN4fP-m-
* @author treeroot E~rs11
* @since 2006-2-2 :5$xh
* @version 1.0 )[e%wPu4e
*/ ZTN:|IKT
public class SortUtil { y21)~
public final static int INSERT = 1; L7i}Ga!8
public final static int BUBBLE = 2; 16a_GwfM
public final static int SELECTION = 3; E\ K
public final static int SHELL = 4; E`A<]dAoK
public final static int QUICK = 5; L"Qh_+
public final static int IMPROVED_QUICK = 6; i5ajM,i/K
public final static int MERGE = 7; R>/QARX
public final static int IMPROVED_MERGE = 8; "$`wk
public final static int HEAP = 9; D2>hMc
4.,KEt'H
public static void sort(int[] data) { 7}2sIf[I
sort(data, IMPROVED_QUICK); Dq0-Kf,^
} bd@*vu}?}
private static String[] name={ %s~NQ;Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N1D6D$s0
}; 8o*\W$K@
5KL9$J9k
private static Sort[] impl=new Sort[]{ <^H1)=tlF
new InsertSort(), BfD,z
new BubbleSort(), \O8Y3|<
new SelectionSort(), m1~qaD<DZ$
new ShellSort(), fW_}!`:
new QuickSort(), d~togTs1
new ImprovedQuickSort(), pDLu+}@
new MergeSort(), c n\k`8
new ImprovedMergeSort(), f_Wkg)g
new HeapSort() +YGw4{\EL
}; _A@fP[C
zhVa.r A
public static String toString(int algorithm){ Ov0O#`
return name[algorithm-1]; w>`h3;,2
} PfwI@%2
$V`KrA~]
public static void sort(int[] data, int algorithm) { W+F<P@[u<$
impl[algorithm-1].sort(data); m &0(%
} 0U>t>&,"
*`@XKK
public static interface Sort { %a)0?U
public void sort(int[] data); aTL8l.c2
} b0~H>cnA
Gvt;Q,hH
public static void swap(int[] data, int i, int j) { y(aAp.S>
int temp = data; 0)6i~MglY
data = data[j]; ;~'cITL
data[j] = temp; 7G<KrKal
} I]uOMWZs
} (<d&BV-"