[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; h"j{B
} A07FjT5w8
int i1=l; 9"&HxyOfX
int i2=mid+1; z[l17+v
for(int cur=l;cur<=r;cur++){ ;+cZS=
if(i1==mid+1) w J; y4
data[cur]=temp[i2++]; kZfO`BVL
else if(i2>r) <wa}A!fu
data[cur]=temp[i1++]; iB{O"l@w
else if(temp[i1] data[cur]=temp[i1++]; i,,UD
else nXXyX[c4e
data[cur]=temp[i2++]; Y*J,9
} ,myl9s
} EFhe``
=Bl#CE)X
} H~fZA)W 4Y
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改进后的归并排序: }]kzj0m
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package org.rut.util.algorithm.support; 7h,SX]4Q
jf@#&%AC9
import org.rut.util.algorithm.SortUtil; FK0nQ{uB"
!'MZeiLP
/** YaDr6)
* @author treeroot Sky!ZN'I
* @since 2006-2-2 os"o0?
* @version 1.0 L=?Yc*vg
*/ }m(u oT~
public class ImprovedMergeSort implements SortUtil.Sort { &*r YY\I
t\S}eoc
private static final int THRESHOLD = 10; QXniWJJ
[.;VCk)0x
/* ~}(}:#>T
* (non-Javadoc) M{Wla7
* ?=-18@:.ss
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Od)]FvO
*/ )Yy`$`
public void sort(int[] data) { ?tSFM:9PU
int[] temp=new int[data.length]; 5'Y @c
mergeSort(data,temp,0,data.length-1); }qRYXjS
} bR(rZu5
5e6f)[}
private void mergeSort(int[] data, int[] temp, int l, int r) { skf7Si0z
int i, j, k; &dH/V-te
int mid = (l + r) / 2; y>UM~E
if (l == r) _}8O15B|
return; PH^AT<U:T
if ((mid - l) >= THRESHOLD) !D!Q]M5oU
mergeSort(data, temp, l, mid); eE '\h
else +m^ gj:yL
insertSort(data, l, mid - l + 1); QQj)"XJ29
if ((r - mid) > THRESHOLD) ?v\A&d
mergeSort(data, temp, mid + 1, r); (0bvd
else amK"Z<V F
insertSort(data, mid + 1, r - mid); TkM8GK-3
cR*D)'/tl
for (i = l; i <= mid; i++) { ~K5eO-
temp = data; X3P~z8_
} 1.6yi];6
for (j = 1; j <= r - mid; j++) { WnyEdYA
temp[r - j + 1] = data[j + mid]; [2"a~o\
} 7o-umZ}8
int a = temp[l]; pHXslmrD
int b = temp[r]; BRLrD/8Le
for (i = l, j = r, k = l; k <= r; k++) { cQ} ,q+GR~
if (a < b) { kl,I.2-
data[k] = temp[i++]; 9LI#&\lba
a = temp; |7LhE+E
} else { .Ks%ar
data[k] = temp[j--]; L'iENZI$
b = temp[j]; tURjIt,I
} j'R{llZW
} kI<;rP1S|
} n6Je5fE
i 3?=up!
/** N =FX3Z
* @param data <b.?G
* @param l 9~/k25P
* @param i >hHjDYjbf
*/ O/Ub{=g
private void insertSort(int[] data, int start, int len) { G:7HL5u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ry)g<OA
} >4 4A
} N_Q)AXr)
} WhQK3hnm
} ^cs:S-s
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堆排序： @ qy n[C
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package org.rut.util.algorithm.support; 1zqIB")s>
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import org.rut.util.algorithm.SortUtil; E!nEB(FD
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/** jeXP|;#Una
* @author treeroot C,r[H5G#
* @since 2006-2-2 a|?&
* @version 1.0 ,<Zu4bww
*/ ,j E'd'$
public class HeapSort implements SortUtil.Sort{ #}Y$+FtO
HqC 1Dkw
/* (non-Javadoc) s\O4D*8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -!V+>.Oh
*/ Hz~?"ts@;
public void sort(int[] data) { :59fb"^$
MaxHeap h=new MaxHeap(); cetHpU,
h.init(data); UVa:~c$U4
for(int i=0;i h.remove(); H2[VZ&Pg
System.arraycopy(h.queue,1,data,0,data.length); 7~&
} r*_z<^d
!8YZ;l
private static class MaxHeap{ k@:M#?(F
Bu_/yKW
void init(int[] data){ y.vYT{^
this.queue=new int[data.length+1]; ^F\RM4|,
for(int i=0;i queue[++size]=data; b* (~8JxZ
fixUp(size); nYy%=B|>
} f4[fXP;A
} @N+ }cej
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private int size=0; rG[iEY
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private int[] queue; >2vUFq`H
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public int get() { r:N =?X`N
return queue[1]; LL% Aw)Q`
} 1'Sr0 oEd3
?|,dHqh{nM
public void remove() { (dvsGYT|.
SortUtil.swap(queue,1,size--); w8veh[%3n
fixDown(1); H#/ #yVw
} @G'&7-(h*
file://fixdown t"# .I?S0
private void fixDown(int k) { <9f;\+zA
int j; [Ey[A|g
while ((j = k << 1) <= size) { a9LK}xc={
if (j < size %26amp;%26amp; queue[j] j++; }Br=eaY
if (queue[k]>queue[j]) file://不用交换 hSkI]%
break; /Uxp5 b h
SortUtil.swap(queue,j,k); y0}3s)lKv
k = j; fhwJ
} D@W[Nd5MJ
} M$J{clr
private void fixUp(int k) { +>bm~6
while (k > 1) { /6fa 7;
int j = k >> 1; X%X`o%AqC
if (queue[j]>queue[k]) =:fN
break; U~3uu&/r
SortUtil.swap(queue,j,k); 1PGY/c
k = j; 5z/*/F=X
} ,i]X^z5!
} mM#[XKOC<
6&9}M Oc
} [d dKC)tA
uy'I#^Bt
} ;r8< Ed
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SortUtil： QH>e_
#!.26RM:P
package org.rut.util.algorithm; RKi11z
DjLSl,Z
import org.rut.util.algorithm.support.BubbleSort; xVnk]:c
import org.rut.util.algorithm.support.HeapSort; )t#>fnN
import org.rut.util.algorithm.support.ImprovedMergeSort; ]`+J!G,
import org.rut.util.algorithm.support.ImprovedQuickSort; U3t$h
import org.rut.util.algorithm.support.InsertSort; ]S0tK
import org.rut.util.algorithm.support.MergeSort; ioW&0?,Ym
import org.rut.util.algorithm.support.QuickSort; Z:(Zy
import org.rut.util.algorithm.support.SelectionSort; ]nIH0k3y
import org.rut.util.algorithm.support.ShellSort; ;9&#Sb/
^QG;:.3v
/** h4,g pV>t
* @author treeroot MA`.&MA.
* @since 2006-2-2 ~7 w"$H8
* @version 1.0 kO3N.t@n
*/ x& a<u@[wa
public class SortUtil { M7`iAa.}
public final static int INSERT = 1; B0+r
public final static int BUBBLE = 2; Z>l%:;H
public final static int SELECTION = 3; C<B+!16
public final static int SHELL = 4; PKjM1wqaG@
public final static int QUICK = 5; H@uDP
public final static int IMPROVED_QUICK = 6; -prc+G,qyp
public final static int MERGE = 7; j+eto'
public final static int IMPROVED_MERGE = 8; GbB:K2
public final static int HEAP = 9; zNo>V8B(
1CmjEAv%/
public static void sort(int[] data) { R3bHX%T
sort(data, IMPROVED_QUICK); H13kNhV9
} (O!Q[WLS
private static String[] name={ dje}CbZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \+#>XDD
}; (5/>arDn
xJ rKH
private static Sort[] impl=new Sort[]{ CT0 ~
new InsertSort(), ^yFtL(x,
new BubbleSort(), Ze.\<^-t
new SelectionSort(), aj`_*T"A
new ShellSort(), z)_h"y?H{%
new QuickSort(), /^pPT6
new ImprovedQuickSort(), A.5`+
new MergeSort(), i-FsA
new ImprovedMergeSort(), Vh}F#~BrI
new HeapSort() H&*KpOL
}; qP5'&!s&!
BG9.h!
public static String toString(int algorithm){ h0z>dLA#2
return name[algorithm-1]; JwNB)e D
} WV&grG|
V48o+O
public static void sort(int[] data, int algorithm) { PRi1 `%d
impl[algorithm-1].sort(data); #I9hKS{
} gp(: o$
;&} rO.0
public static interface Sort { ^Q9!DF m
public void sort(int[] data); Sg+0w7:2
} b[Qe} `W
^rh{
public static void swap(int[] data, int i, int j) { [XbNZ6
int temp = data; %8c2d
data = data[j]; M"\j7(
data[j] = temp; f=--$o0U~
} lL;SP&
} J/xbMMb