[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; eBRP%<=>D
} P+|8MT0
int i1=l; w+(wvNmNEK
int i2=mid+1; Y,"MQFr(o
for(int cur=l;cur<=r;cur++){ %>U*A
if(i1==mid+1) ]<?)(xz
data[cur]=temp[i2++]; ZVR 9vw28
else if(i2>r) .qPfi] ty
data[cur]=temp[i1++]; 6OW-Dif^AG
else if(temp[i1] data[cur]=temp[i1++]; `GWq3c5
else EQhV}9
data[cur]=temp[i2++]; -Dm.z16
} oVsazYJ|?
} >Ga1p'8FtU
25[/'7_"
} ~ b_gwJ'
m =F@CA~C
改进后的归并排序: 0>MI*fnY"
zQ+t@;g1
package org.rut.util.algorithm.support; #Kr.!uD
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import org.rut.util.algorithm.SortUtil; u@'zvkb@
[LDzR7vnf
/** i)3\jO0&GU
* @author treeroot gQDK?aQX
* @since 2006-2-2 *?"{T;4u~O
* @version 1.0 X($SBUS6
*/ I@M^Wu]wW
public class ImprovedMergeSort implements SortUtil.Sort { {\zr_v`g
@&B!P3{f
private static final int THRESHOLD = 10; _?c.3+;s
9Dw&b
/* T$;XJx
* (non-Javadoc) v|2j~
* @v=q,A8_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I!O S&8:u
*/ loe>"_`Cq
public void sort(int[] data) { ybO,~TQ
int[] temp=new int[data.length]; d~8~RT2m
mergeSort(data,temp,0,data.length-1); ;BVhkWA
} PlUjjJU
7#3)&"j
private void mergeSort(int[] data, int[] temp, int l, int r) { J,Ap9HJt
int i, j, k; `aycYoD
int mid = (l + r) / 2; .Tv(1HAc2l
if (l == r) dhkpkt<G8
return; 6Qu*'
if ((mid - l) >= THRESHOLD) W9'jzP
mergeSort(data, temp, l, mid); j56 An6g
else w%n]~w=8
insertSort(data, l, mid - l + 1); I!D*(>
if ((r - mid) > THRESHOLD) 2N 4>
mergeSort(data, temp, mid + 1, r); 7`!( 8
else %'z3es0
insertSort(data, mid + 1, r - mid); ![^h<Om
zmRK%a(
for (i = l; i <= mid; i++) { ,eCXT=6
temp = data; 5 ZPUY
} 5zOSb$;
for (j = 1; j <= r - mid; j++) { 1+($"$ZC&B
temp[r - j + 1] = data[j + mid]; cO&9(.d
} I1O?)x~
int a = temp[l]; It-*CD9
int b = temp[r]; >oDP(]YGg
for (i = l, j = r, k = l; k <= r; k++) { KL]!E ~i
if (a < b) { f*Js= hvO
data[k] = temp[i++]; l.l~K%P'h
a = temp; / u6$M/Cf>
} else { G.TX1
data[k] = temp[j--]; Hc|U@G
b = temp[j]; )A=g# D#
} )n@3@NV
} U{(07GNm#
} !3# }ZC2
BxYA[#fd}
/** 3=7h+ZgB
* @param data )W|jt/
* @param l ;(6lN<iU
* @param i %$| k3[4V
*/ I=a$1%BzEX
private void insertSort(int[] data, int start, int len) { Pc==]H(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WEAXqDjM
} W=]",<
} W[<":NX2
} caD;V(
} ~1sl.8tF
5T#D5Z<m
堆排序： VTfaZ/e.
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package org.rut.util.algorithm.support; ][#*h`I
[d>yo_iB
import org.rut.util.algorithm.SortUtil; ;@~*z4U
f`=T@nA
/** yt:V+qdv
* @author treeroot Fxx2vTV4ag
* @since 2006-2-2 iDc|9"|Tf3
* @version 1.0 b)^ZiRW``
*/ #2ASzCe
public class HeapSort implements SortUtil.Sort{ uA`PZ|
% ul{nL:
/* (non-Javadoc) ^oO5t-9<!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =c^=Yvc7U
*/ w1(06A}/
public void sort(int[] data) { g@VndAp
MaxHeap h=new MaxHeap(); rss.F3dK
h.init(data); /C2f;h(1
for(int i=0;i h.remove(); q%Jy>IXt
System.arraycopy(h.queue,1,data,0,data.length); <>Ddxmw
} F>(#Af9
$: m87cR~
private static class MaxHeap{ NVWeJ+w
m>dcb 6B+g
void init(int[] data){ w?W e|x3
this.queue=new int[data.length+1]; 1y-lZ}s_
for(int i=0;i queue[++size]=data; 9|A-oS
fixUp(size); q)xl$*g
} B00wcYM<1r
} (jMAa%
L^{;jgd&T9
private int size=0; _s-HlE?C
G_N-}J>EP
private int[] queue; Q1\k`J
ww t()
public int get() { %g@3S!lK
return queue[1]; O| 6\g>ew
} 'EET3RK-S
Bd~cY/M
public void remove() { JBEgiQ/
SortUtil.swap(queue,1,size--); @))}\:
fixDown(1); 8w8I:*
} skDk/-*R
file://fixdown hi D7tb=g~
private void fixDown(int k) { '}pgUh_
int j; }A)36
while ((j = k << 1) <= size) { kbp( a+5
if (j < size %26amp;%26amp; queue[j] j++; ngY+Ym
if (queue[k]>queue[j]) file://不用交换 nHA`B.:B
break; Sa?5iFg
SortUtil.swap(queue,j,k); Lr?4Y
k = j; n &\'Hm
} {.3
} 3ES[ N.V#
private void fixUp(int k) { 7l#2,d4
while (k > 1) { "^ 6lvZP(
int j = k >> 1; [bi3%yWh
if (queue[j]>queue[k]) /q"d`!h)w
break; qM1)3.)[:
SortUtil.swap(queue,j,k); x !:9c<
k = j; k Kp6
} NB W%.z
} 4%!{?[$
NrJ_6sjF0g
} Q%n{*py
$D/bU lFx
} OSa}8rlr'
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SortUtil： fZ6 fV=HEF
;N$0)2w
package org.rut.util.algorithm; O\4+_y
b$goF }b'g
import org.rut.util.algorithm.support.BubbleSort; [<Os~bfOv
import org.rut.util.algorithm.support.HeapSort; Wm$`ae
import org.rut.util.algorithm.support.ImprovedMergeSort; ,5\2C{
import org.rut.util.algorithm.support.ImprovedQuickSort; 5i4V5N>3
import org.rut.util.algorithm.support.InsertSort; 1qLl^DW
import org.rut.util.algorithm.support.MergeSort; KM/U?`6>:
import org.rut.util.algorithm.support.QuickSort; A{aw< P|+
import org.rut.util.algorithm.support.SelectionSort; aVppOxA
import org.rut.util.algorithm.support.ShellSort; |k`f/*
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/** bB:r]*_ s]
* @author treeroot Qst \b8,
* @since 2006-2-2 !EX?m }7
* @version 1.0 n^iNo
*/ BKC7kDK3H
public class SortUtil { JO2ZS6k[
public final static int INSERT = 1; WxVn&c\
public final static int BUBBLE = 2; wC(vr.,F
public final static int SELECTION = 3; 11)/] ?/j
public final static int SHELL = 4; [lNqT1%]
public final static int QUICK = 5; =My}{n[
public final static int IMPROVED_QUICK = 6; axK6sIxx
public final static int MERGE = 7; GJ1;\:cQq
public final static int IMPROVED_MERGE = 8; \~@[QGKN
public final static int HEAP = 9; rU=b?D)n!w
}+91s'/c
public static void sort(int[] data) { 7?=43bZl
sort(data, IMPROVED_QUICK); eyeNrk*2o
} 8K\'Z
private static String[] name={ ]d@^i)2LF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qQfqlD<
}; qwq/Xcv
I1Hw"G"&
private static Sort[] impl=new Sort[]{ 1t/dxB;
new InsertSort(), de> ?*%<
new BubbleSort(), xS6(K
new SelectionSort(), 1)TK01R8
new ShellSort(), kOs(?=
new QuickSort(), m#oh?@0}
new ImprovedQuickSort(), q} ]'Q -
new MergeSort(), 9$7&URwSDI
new ImprovedMergeSort(), Yim{U:F
new HeapSort() H>60D|v[
}; d"#gO,H0
bTZ>@~$
public static String toString(int algorithm){ j*uXB^4
return name[algorithm-1]; 3/X-Cr+d
} )!tCC-Cr
16"#i
public static void sort(int[] data, int algorithm) { >(hSW~i~
impl[algorithm-1].sort(data); vB[~pQ;Z
} OnZF6yfN=3
t?gJNOV
public static interface Sort { yJ%t^ X_
public void sort(int[] data); 8RVS)D''
} HbcOTd)=5
3pvYi<<D'
public static void swap(int[] data, int i, int j) { z5x _fAT(
int temp = data; *yJ[zXXjJ
data = data[j]; led))qd@V-
data[j] = temp; &~RR&MdZ2
} K&*iw`
} LH4>@YPGE#