[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; }{;m:Iia_
} J =o,: 3"
int i1=l; N'_,VB
int i2=mid+1; lot7SXvK
for(int cur=l;cur<=r;cur++){ m=i8o `
if(i1==mid+1) X8l[B{|
data[cur]=temp[i2++]; {IEc{y7?gO
else if(i2>r) NN1d?cOn
data[cur]=temp[i1++]; l1}=>V1
else if(temp[i1] data[cur]=temp[i1++]; %lPAq
else _YzItge*
data[cur]=temp[i2++]; tcOgF:
} F VW&&ft
} kQ4-W9u
2ILMf?}
} vum6O3
z7'3d7r?
改进后的归并排序: y BF3Lms
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package org.rut.util.algorithm.support; JSX-iHhW
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import org.rut.util.algorithm.SortUtil; vk\a>};
hnha1 f
/** 7z!|sPW](b
* @author treeroot Y$SZqW0!/
* @since 2006-2-2 hMz= \)Pl
* @version 1.0 +e_NpC
*/ =YlsJ={h
public class ImprovedMergeSort implements SortUtil.Sort { HJ[@;F|aU
Y6L_ _ RT
private static final int THRESHOLD = 10; >mRA|0$
to~Ap=E
/* 6QVdnXoG/
* (non-Javadoc) a$!|)+
* *BzqAi0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d dB}mk6
*/ )s^D}I(
public void sort(int[] data) { EjLj5Z/q
int[] temp=new int[data.length]; zs!,PQF(
mergeSort(data,temp,0,data.length-1); .G#wXsJj
} \{
zr%2oFeX,
private void mergeSort(int[] data, int[] temp, int l, int r) { In)8AK(Hw
int i, j, k; $/</J]2`;
int mid = (l + r) / 2; FbB^$ ]*
if (l == r) 9[}L=n
return; [#$:X+lw
if ((mid - l) >= THRESHOLD) 7Pspx'u
mergeSort(data, temp, l, mid); {HPKp&kl
else Lqy]bnY
insertSort(data, l, mid - l + 1); ?EF[OyE
if ((r - mid) > THRESHOLD) M]&F1<
mergeSort(data, temp, mid + 1, r); Xy[O
else ) jBPt&
insertSort(data, mid + 1, r - mid); K?0f)@\nx
"<6X=|C
for (i = l; i <= mid; i++) { {xb8H
temp = data; dLl/V3C6t
} -Z)j"J
for (j = 1; j <= r - mid; j++) { q_PxmPE@3v
temp[r - j + 1] = data[j + mid]; 5P~{*of
} =Tv;?U C
int a = temp[l]; ~/LO @
int b = temp[r]; :tclYX
for (i = l, j = r, k = l; k <= r; k++) { 5.!iVyN
if (a < b) { `7<4]#b^o
data[k] = temp[i++]; m'D_zb9+
a = temp; Y?Ph%i2E
} else { ?HT+| !4p
data[k] = temp[j--]; ';"W0
b = temp[j]; %D|p7&
} ,r\
} 2LS03 27
} @*W)r~ "~
* S4IMfp
/** 1fwjW0t
* @param data ]6)^+(zU
* @param l "w3#2q&
* @param i 6qfL-( G
*/ 1FC'DH!
private void insertSort(int[] data, int start, int len) { ,e\'Y!'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .$nQD.X
} zzlV((8~
} A2 'W
} :^~I@)"ov
} +[386
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堆排序： ia#Z$I6
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package org.rut.util.algorithm.support; F*""n
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import org.rut.util.algorithm.SortUtil; +u+|9@
l* C>
/** ^Pqj*k+F
* @author treeroot z7B>7}i-
* @since 2006-2-2 '%U'%')
* @version 1.0 WE;QEA/
*/ MDkcG"O
public class HeapSort implements SortUtil.Sort{ _XLGXJ[B
9eOP:/'}w
/* (non-Javadoc) .W4P/Pw'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -|s w\Q
*/ mO];+=3v8
public void sort(int[] data) { 39 D!e&
MaxHeap h=new MaxHeap(); Cu*+E%P9`
h.init(data); SM%N]/@U
for(int i=0;i h.remove(); 7wKN
System.arraycopy(h.queue,1,data,0,data.length); 45g:q
} !h\.w9o[
.!#0eAT
private static class MaxHeap{ 1Pya\To,m
$7k"?M_
void init(int[] data){ -!_f-Nny
this.queue=new int[data.length+1]; qfJi[8".
for(int i=0;i queue[++size]=data; ./SDZ:5/
fixUp(size); xi5G?r
} Da.eVU;
} U$zd3a_(
lG[@s 'j
private int size=0; =j,2
-G\svwv@)
private int[] queue; $;GH -+
Vl"20):
public int get() { Ltv!;^Q5
return queue[1]; 3y#0Lb-y
} T!![7Rs
c~1+5&
public void remove() { 0PfjD
SortUtil.swap(queue,1,size--); B49: R>
fixDown(1); 6-"@j@l5<
} Vr/UY79
file://fixdown (2 nSZRB
private void fixDown(int k) { Q,pnh!.-c
int j; "==fWf
while ((j = k << 1) <= size) { =rL%P~0wq
if (j < size %26amp;%26amp; queue[j] j++; W4MU^``
if (queue[k]>queue[j]) file://不用交换 `<Ry_}V
break; EJAk'L+nuH
SortUtil.swap(queue,j,k); ANIx0*Yl(
k = j; Ax"]+pb
} @4)NxdOE
} >* Ag0.Az
private void fixUp(int k) { !U6q;' )-
while (k > 1) { %5g(|Y]
int j = k >> 1; S10"yhn(-t
if (queue[j]>queue[k]) :%&|5Ytb
break; )P13AfK
SortUtil.swap(queue,j,k); TH[xSg
k = j; AW{"9f4
} .wH`9aq;5@
} <'y}y}%
rdQKzJiX=U
} 7+(on
`kE ;V!n?
} 38<Z=#S
DxM$4
SortUtil： KM-d8^\:
1>~bzXY#
package org.rut.util.algorithm; 0H9UM*O
G4&vrM,f
import org.rut.util.algorithm.support.BubbleSort; e\8|6<o[
import org.rut.util.algorithm.support.HeapSort; +aY]?]
import org.rut.util.algorithm.support.ImprovedMergeSort; k-V3l
import org.rut.util.algorithm.support.ImprovedQuickSort; &\Ze<u
import org.rut.util.algorithm.support.InsertSort; ]Rk4"i
import org.rut.util.algorithm.support.MergeSort; ` x|=vu-
import org.rut.util.algorithm.support.QuickSort; ;?h+8Z/{
import org.rut.util.algorithm.support.SelectionSort; K*!qt(D&
import org.rut.util.algorithm.support.ShellSort; `;~A
?hC,49
/** {>v5~G
* @author treeroot *JD-|mK
* @since 2006-2-2 If>bE!_BO
* @version 1.0 )44c[Z
*/ @PL.7FM<v
public class SortUtil { _O,k0O
public final static int INSERT = 1; Q[n*ce7L0
public final static int BUBBLE = 2; }Fq~!D Ee
public final static int SELECTION = 3; f(Su
public final static int SHELL = 4; Xp67l!{v
public final static int QUICK = 5; >TQNrS^$J
public final static int IMPROVED_QUICK = 6; s~p(59
public final static int MERGE = 7; ;_~9".'<d
public final static int IMPROVED_MERGE = 8; >0X_UDAWz
public final static int HEAP = 9; [r#m +R"N
f>CJ1;][{
public static void sort(int[] data) { ;% <[*T:*'
sort(data, IMPROVED_QUICK); K[q{)>,9
} |tr^ `Z
private static String[] name={ ;:PxWm|_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Of}dsav
}; mu*RXLai
jk\z-hd
private static Sort[] impl=new Sort[]{ 0h-'TJg*sk
new InsertSort(), (=-6'23q)
new BubbleSort(), Q"vhl2RX
new SelectionSort(), I/B*iW^
new ShellSort(), ?hmuAgOtbh
new QuickSort(), #3knKBH
new ImprovedQuickSort(), A8X3|<n=
new MergeSort(), goqm6L^Cu
new ImprovedMergeSort(), C~-.zQ$
new HeapSort() 91#rP|88;
}; ;5p;i8m
;F;Vm$
public static String toString(int algorithm){ |!q,J
return name[algorithm-1]; elGwS\sw
} -=WQed}
>bFrJz}
public static void sort(int[] data, int algorithm) { kXroFLrY
impl[algorithm-1].sort(data); Ul<:Yt&nI
} Gk']Ma2J}
"wR1=&gk
public static interface Sort { 8l l}"
public void sort(int[] data); q o6~)Aws
} &_$0lIDQ
Qv WvS9]
public static void swap(int[] data, int i, int j) { ";U#aK1p
int temp = data; o- v#Zl
data = data[j]; X> T_Xc
data[j] = temp; `iNH`:[w
} lyD=n
} U#G<cV79