[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; vb 1@yQ
} 1g##sSa6
int i1=l; ;*ix~taL%
int i2=mid+1; DFhXx6]
for(int cur=l;cur<=r;cur++){ )VL96did
if(i1==mid+1) =S'%`]f?
data[cur]=temp[i2++]; <IW#ME
else if(i2>r) Spo?i.#
data[cur]=temp[i1++]; 2%*MW"Q
else if(temp[i1] data[cur]=temp[i1++]; 2!&&|Mh}
else b" xmqWa
data[cur]=temp[i2++]; v_e9}yI
} J PyOG_h
} J q{7R
-jgysBw+Xb
} lis/`B\x
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改进后的归并排序: SN4Q))dAU
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package org.rut.util.algorithm.support; *Av"JAX
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import org.rut.util.algorithm.SortUtil; @ '@:sM_
{G <kA(Lm
/** 6v,z@!b
* @author treeroot dz~coZ9
* @since 2006-2-2 WI]o cF
* @version 1.0 >!_Xgw
*/ h:lt<y
public class ImprovedMergeSort implements SortUtil.Sort { tXJUvish
eh,~^x5
private static final int THRESHOLD = 10; omWJJ|b~
eEhr140
/* yj4+5`|f
* (non-Javadoc) LZMYr
* Kwc6mlw~M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4f(Kt,0
*/ 2pdvWWh3l
public void sort(int[] data) { Sq:0w
int[] temp=new int[data.length]; E}%hz*Q)(
mergeSort(data,temp,0,data.length-1); -v6M<
} JCAq8=zM
AoA!q>
private void mergeSort(int[] data, int[] temp, int l, int r) { 7d92Pe
int i, j, k; ;n|^1S<[
int mid = (l + r) / 2; .9O$G2'oh
if (l == r) bc , p}
return; zhY+x<-
if ((mid - l) >= THRESHOLD) G,;,D9jO7
mergeSort(data, temp, l, mid); r\nx=
else VLBE'3Qg1
insertSort(data, l, mid - l + 1); 1s1=rZ!
if ((r - mid) > THRESHOLD) @ P|LLG'
mergeSort(data, temp, mid + 1, r); RpLE 02U
else e8'wG{3A
insertSort(data, mid + 1, r - mid); 64:fs?H
?f/n0U4w
for (i = l; i <= mid; i++) { HHqwq.zIy
temp = data; &@ JvnO:
} Vf(6!iRP@
for (j = 1; j <= r - mid; j++) { };'\~g,1
temp[r - j + 1] = data[j + mid]; YJ(*wByM
} 9W5onn
int a = temp[l]; 'l,V*5L
int b = temp[r]; b,8{ X<
for (i = l, j = r, k = l; k <= r; k++) { 1>L(ul(qGF
if (a < b) { a1Qv@p^._b
data[k] = temp[i++]; M:5b4$Qh<
a = temp; y^o@"IYu3
} else { gk`zA
data[k] = temp[j--]; ^k<oT'89
b = temp[j]; |>z3E z
} KD^N)&k^Kp
} WOh|U4vt
} <]G]W/eB'
z2Z^~,i
/** E@Ad'_H
* @param data XkyKBg-
* @param l N!`e}Z6S
* @param i ~Ch+5A;
*/ qoAj] ")
private void insertSort(int[] data, int start, int len) { rb{P :MX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K(q-?n`<
} U#U]Pt
} P\_`
} Qqlup
} D.mHIsX6\
O eL}EVs8=
堆排序： o;?/HE%,[
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package org.rut.util.algorithm.support; LQjsOo
B,{K*-7)MX
import org.rut.util.algorithm.SortUtil; 7k8pZ
PiA0]>
/** {GJ@psG*
* @author treeroot |7zd%!
* @since 2006-2-2 nR`ov1RH
* @version 1.0 o*J3C>
*/ &iV,W4
public class HeapSort implements SortUtil.Sort{ a1@Y3MQ;i
|DsnNk0c
/* (non-Javadoc) ^_m9KA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {D=@n4JO
*/ h*v8#\b$J_
public void sort(int[] data) { q`r**N+zn
MaxHeap h=new MaxHeap(); o]opdw
h.init(data); pa#IJ
for(int i=0;i h.remove(); h2D>;k
System.arraycopy(h.queue,1,data,0,data.length); uS^Ipxe\
} /3{b%0Aa
Ih"XV
private static class MaxHeap{ " W|%~h
ynrT a..
void init(int[] data){ /Sh#_\x
this.queue=new int[data.length+1]; LEtG|3Dx
for(int i=0;i queue[++size]=data; 15sp|$&`
fixUp(size); 9th,VnD0
} q*9!,!e
} xKho1Z
a0#J9O_
private int size=0; (UxW;
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private int[] queue; X)% A6M
N}t 2Nu-
public int get() { J7g8D{4
return queue[1]; PAM}*'
} :\o {_
tw9f%p
public void remove() { mVpMh#zw
SortUtil.swap(queue,1,size--); b"{'T]"*j
fixDown(1); WA&!;Zq
} rQ qW_t%
file://fixdown {Sj9%2'M)
private void fixDown(int k) { Ptdpj)oi&Q
int j; 2V#>)R#k
while ((j = k << 1) <= size) { W*I(f]8:y`
if (j < size %26amp;%26amp; queue[j] j++; BNs@n"k
if (queue[k]>queue[j]) file://不用交换 D1=((`v '
break; =D<PVGo9
SortUtil.swap(queue,j,k); /PSd9N*=y
k = j; ^0\
} 7x%R:^*4
} pz.JWCU1
private void fixUp(int k) { :BV6y|J9O^
while (k > 1) { dx@-/^.
int j = k >> 1; .0`m\~L
if (queue[j]>queue[k]) ,tu.2VQc@
break; <"my^
SortUtil.swap(queue,j,k); ]z/8KL
k = j; N@Uy=?)ZJ
} IvtJ0
} 8b;1FQ'
A"dR{8&0
} |#cm`v
.Z `av n
} 7 *`h/
Ay0U=#XP
SortUtil： 9 %I?).5
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package org.rut.util.algorithm; oF1,QQ^dg
%D%8^Zd_
import org.rut.util.algorithm.support.BubbleSort; S]Mw#O|
import org.rut.util.algorithm.support.HeapSort; ij(B,Y
import org.rut.util.algorithm.support.ImprovedMergeSort; 8h*Icf
import org.rut.util.algorithm.support.ImprovedQuickSort; m4hg'<<V
import org.rut.util.algorithm.support.InsertSort; SVh 7zh
import org.rut.util.algorithm.support.MergeSort; O @j} K4
import org.rut.util.algorithm.support.QuickSort; i/`m`qdg
import org.rut.util.algorithm.support.SelectionSort; jN;@=COi
import org.rut.util.algorithm.support.ShellSort; &;[Io
L(|N[#
/** pm 9"4z
* @author treeroot {byBcG
* @since 2006-2-2 26I_YL,S
* @version 1.0 Vr`R>S,-
*/ !h23cj+V
public class SortUtil { x7!L{(E3
public final static int INSERT = 1; kwo3`b
public final static int BUBBLE = 2; %InA+5s`
public final static int SELECTION = 3; .*Ct bGw
public final static int SHELL = 4; p6#g;$V$
public final static int QUICK = 5; mGJKvJF
public final static int IMPROVED_QUICK = 6; *rs5]U<
public final static int MERGE = 7; CYs,`
public final static int IMPROVED_MERGE = 8; ;o2$ Q
public final static int HEAP = 9; P2BWuhF
(:TjoXXiY
public static void sort(int[] data) { cdl&9-}
sort(data, IMPROVED_QUICK); ;=eDO(Ij
} 7Bzq,2s
private static String[] name={ -D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fk6%XO
}; [!HEQ8 2g
AN8`7F1
private static Sort[] impl=new Sort[]{ f332J
new InsertSort(), 4o <Uy
new BubbleSort(), ;qafT@ }C
new SelectionSort(), I7|Pi[e
new ShellSort(), LtWP0@JA
new QuickSort(), \o}xF@sM5
new ImprovedQuickSort(), ); !eow
new MergeSort(), M -cTRd-i
new ImprovedMergeSort(), Neq+16*u
new HeapSort() y~AVei&
}; c}Ft^Il
a oD`=I*<
public static String toString(int algorithm){ p4.wh|n
return name[algorithm-1]; 8ndYV>{f
} V+* P2|
8n#HFJ~
public static void sort(int[] data, int algorithm) { c]x1HvPE
impl[algorithm-1].sort(data); 8'r2D+Vwm
} [w>$QR
B8.Pn
public static interface Sort { cv-PRH#
public void sort(int[] data); 6]V4muz#c
} @TLS<~
<C1H36p
public static void swap(int[] data, int i, int j) { mq aHwID
int temp = data; 3c#BKHNC
data = data[j]; SN9kFFIPb=
data[j] = temp; 4x{0iav
} "9ZID-~]
} HmiR.e%<b