[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; JKO*bbj
} n9k
int i1=l; Nh/i'q/
int i2=mid+1; in,0(I&I
for(int cur=l;cur<=r;cur++){ )'e1@CR
if(i1==mid+1) O@W/s!&lFa
data[cur]=temp[i2++]; ZWzr8oY)
else if(i2>r) yV(9@lj3;
data[cur]=temp[i1++]; j8bA"r1
else if(temp[i1] data[cur]=temp[i1++]; +ZiYl[_|
else "^BA5
data[cur]=temp[i2++]; m_Z(osoE#W
} h&v].l
} 2_o\Wor#
9) $[W
} U:eX^LE7
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改进后的归并排序: br 3-.g
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package org.rut.util.algorithm.support; ,`!lZ| U
02tN=}Cj)
import org.rut.util.algorithm.SortUtil; @qjN>PH~
bi+g=cS
/** "rEfhzmyF
* @author treeroot jq8TfJ|
* @since 2006-2-2 j)@{_tv6;
* @version 1.0 ZqpK}I
*/ s|c}9/Xe)
public class ImprovedMergeSort implements SortUtil.Sort { Hg8 4\fA
bj 8pqw|;
private static final int THRESHOLD = 10; z7L+wNYwg
w9RBT(u
/* &+ PVY>q
* (non-Javadoc) MZcvr9y
* Y8IC4:EO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D)l\zs%ie
*/ vlZmmQeJm
public void sort(int[] data) { [q_62[-X
int[] temp=new int[data.length]; p1i}fGS
mergeSort(data,temp,0,data.length-1); cC|
} KLVYWZib
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private void mergeSort(int[] data, int[] temp, int l, int r) { \v<S:cTf
int i, j, k; kq?:<!z
int mid = (l + r) / 2; G/fBeK$.
if (l == r) }lhk;#r
return; >=:mtcph
if ((mid - l) >= THRESHOLD) M6qNh`+HO
mergeSort(data, temp, l, mid); F1B/cd
else Q*1'k%7
insertSort(data, l, mid - l + 1); @p^EXc*|
if ((r - mid) > THRESHOLD) q _K@KB
mergeSort(data, temp, mid + 1, r); k{b|w')
else uysTyzx
insertSort(data, mid + 1, r - mid); `'3 De(
c(FGW7L<
for (i = l; i <= mid; i++) { -r_\=<(
temp = data; :"Tkl$@,
} 89{;R
for (j = 1; j <= r - mid; j++) { @|">j#0
temp[r - j + 1] = data[j + mid]; KSEKoHJo
} }U5$~,*p
int a = temp[l]; QHUFS{G]
int b = temp[r]; 3&{6+A
for (i = l, j = r, k = l; k <= r; k++) { 'W54 T
if (a < b) { F`(;@LO
data[k] = temp[i++]; "cly99t
a = temp; {%^4%Eco
} else { !;[cJbqnh
data[k] = temp[j--]; |JWYsqJ0U
b = temp[j]; n c~JAT#'
} Oj_F1. r
} DrAIQ7Jd
} aj .7t=^
)1@%!fr
/** ,D(Bg9C
* @param data ePv`R'#
* @param l (V'w5&f(L
* @param i WS.g`%
*/ P_8!Gp
private void insertSort(int[] data, int start, int len) { N=T}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )8}k.t>'s
} WJa7
} F:jtzy"
} 9xw"NcL
} %Ny1H/@Q1+
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堆排序： V:P]Ved
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package org.rut.util.algorithm.support; A:z
52Dgul
import org.rut.util.algorithm.SortUtil; 5A|dhw
#Hu##x|
/** u(f;4`
* @author treeroot Y9vi&G?Jl
* @since 2006-2-2 iCh8e>+
* @version 1.0 rLmc(-q
*/ ~!7x45(1#
public class HeapSort implements SortUtil.Sort{ ]>k8v6*=
ycOnPTh
/* (non-Javadoc) #<sK3PT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !T ,=kh
*/ @.}Y'`9L
public void sort(int[] data) { /%p ~
MaxHeap h=new MaxHeap(); _zzNF93Bn
h.init(data); !?+0O]`}
for(int i=0;i h.remove(); EowzEGq!a5
System.arraycopy(h.queue,1,data,0,data.length); _!Tjb^
} <Uf`'X\e6
Cd]A1<6s
private static class MaxHeap{ a&)!zhVP
gE=9K @
void init(int[] data){ wS&D-!8v
this.queue=new int[data.length+1]; KECW~e`
for(int i=0;i queue[++size]=data; [cznhIvyO
fixUp(size); 83'+q((<
} KiKw,@
} whP5u/857
aE3eYl9u
private int size=0; ]$^HGmP
ME]89 T&
private int[] queue; mQ`2c:Rn&7
=ePX^J*M'
public int get() { N1.1
return queue[1]; Lz-|M?(
} !hS)W7!ik
OU#p^5K
public void remove() { 94t`&jZ&|u
SortUtil.swap(queue,1,size--); Ct~j/.
fixDown(1); zOFHdd ,"g
} ~ QohP`_
file://fixdown g&EK^q
private void fixDown(int k) { |42;171
int j; _29wQn@]
while ((j = k << 1) <= size) { S+wT}_BQ
if (j < size %26amp;%26amp; queue[j] j++; ~%M*@fm
if (queue[k]>queue[j]) file://不用交换 shy[>\w
break; U@n5:d=
SortUtil.swap(queue,j,k); z\8s |!
k = j; o:3(J}
} >BK/HuS
} kw gLK@@%1
private void fixUp(int k) { `VUJW]wGu
while (k > 1) { 2 @T~VRy
int j = k >> 1; R2C~.d_TDu
if (queue[j]>queue[k]) 5VQ-D`kE+
break; H8dS]N~[Y
SortUtil.swap(queue,j,k); :i0;jWcb
k = j; W+U0Y,N6
} }gt)cOaY
} g"m9[R=]6
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} JXq!v:w6
~jHuJ`]DF
} N81M9#,["~
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SortUtil： Kr1Y3[iNv
oz,.gP%
package org.rut.util.algorithm; Buh}+n2]5
!]D`|HoW
import org.rut.util.algorithm.support.BubbleSort; UQ7]hX9
import org.rut.util.algorithm.support.HeapSort; In1n.oRFn^
import org.rut.util.algorithm.support.ImprovedMergeSort; -KfK~P3PF
import org.rut.util.algorithm.support.ImprovedQuickSort; 4e AMb
import org.rut.util.algorithm.support.InsertSort; >b=."i
import org.rut.util.algorithm.support.MergeSort; ONDO xXs
import org.rut.util.algorithm.support.QuickSort; G%>[7]H
import org.rut.util.algorithm.support.SelectionSort; >G%oWRk
import org.rut.util.algorithm.support.ShellSort; oJ3(7Sz
wF%RM$
/** CnZEBAU
* @author treeroot 5$Kj#9g-#
* @since 2006-2-2 M<NY`7$^
* @version 1.0 6<QC|>p
*/ t6mv
public class SortUtil { pnz:<V"Y(
public final static int INSERT = 1; :FH&#Eq~4
public final static int BUBBLE = 2; chKEGosbF
public final static int SELECTION = 3; "p|.[d
public final static int SHELL = 4; UA2KY}pz5
public final static int QUICK = 5; 5~jz| T}s
public final static int IMPROVED_QUICK = 6; U] GD6q
public final static int MERGE = 7; 4pQf*l8e
public final static int IMPROVED_MERGE = 8; j|&D(]W/
public final static int HEAP = 9; zy"k b
4KR`
public static void sort(int[] data) { )1Y?S;
sort(data, IMPROVED_QUICK); lz<' L. .
} Ev7v,7`z
private static String[] name={ (jj`}Qe3U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +WMXd.iN,
}; yFb"2
gCiM\Qx
private static Sort[] impl=new Sort[]{ 1jop;{,^
new InsertSort(), } S]!W\a
new BubbleSort(), jn(!6\n"
new SelectionSort(), $cJ fdE
new ShellSort(), YaC[S^p
new QuickSort(), <DR!AR)
new ImprovedQuickSort(), _Y]Oloo('
new MergeSort(), #Ktk["6
new ImprovedMergeSort(), :3 Hz!iZM
new HeapSort() BN%cX2j
}; %*npLDi
|%ZJN{!R
public static String toString(int algorithm){ :3D6OBkB
return name[algorithm-1]; YG:^gi
} (Sgsy^|N
tD}-&"REP
public static void sort(int[] data, int algorithm) { 6B7*|R>
impl[algorithm-1].sort(data); "9QZX[J|*
} \~+b&
8OV=;aM?{
public static interface Sort { G6W|l2P!
public void sort(int[] data); PLz+%L;{
} K\fD';
Y%0rji
public static void swap(int[] data, int i, int j) { !m9hL>5vR
int temp = data; rEC
data = data[j]; 00dY?d{[D
data[j] = temp; ]cS(2hP7
} a)=|{QR>W
} (?^F }]