[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; -ob_]CKtJ~
} i0uBb%GMT
int i1=l; u93=>S
int i2=mid+1; TB] %?L:
for(int cur=l;cur<=r;cur++){ d\`A ^
if(i1==mid+1) 0lNVQxG
data[cur]=temp[i2++]; &nk6_{6 c
else if(i2>r) B$k<F8!%
data[cur]=temp[i1++]; ND\&#
else if(temp[i1] data[cur]=temp[i1++]; P>=~\v nN#
else =R#K`H66j
data[cur]=temp[i2++]; MN2#
} cL&V2I5O
} Q5e ,[1
%t0Fx
} omM*h{z$$
buo_H@@p{s
改进后的归并排序: yhe$A<Rl=
.~V0>r~my
package org.rut.util.algorithm.support; :X[(ymWNE
8uoFV=bj\
import org.rut.util.algorithm.SortUtil; b r)oSw
%3'4QmpR
/** C #ng`7 q
* @author treeroot S .rT5A[
* @since 2006-2-2 PY: l
* @version 1.0 KO(+%>^R
*/ XM3N>OR.
public class ImprovedMergeSort implements SortUtil.Sort { 4NL TtK
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private static final int THRESHOLD = 10; irCS}Dbw
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/* AiSO|!<.N
* (non-Javadoc) lhTjG,U=
* ll{jE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e#K =SV!H
*/ vV1F|
public void sort(int[] data) { p5^,3&
int[] temp=new int[data.length]; h&J6
mergeSort(data,temp,0,data.length-1); ^_JD 7-g
} ;Jt*s
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private void mergeSort(int[] data, int[] temp, int l, int r) { )J8dm'wH92
int i, j, k; i8I%}8
int mid = (l + r) / 2; ;HM& ":7
if (l == r) IC+Z C
return; KzZ! CB\
if ((mid - l) >= THRESHOLD) >2`)S{pBD
mergeSort(data, temp, l, mid); !*.mcIQT
else Zo`'xg
insertSort(data, l, mid - l + 1); &R/)#NAp
if ((r - mid) > THRESHOLD) w4pU^&O
mergeSort(data, temp, mid + 1, r); I!.o&dk
else Rd;k>e
insertSort(data, mid + 1, r - mid); 7]YLe+Ds
<3z]d?u
for (i = l; i <= mid; i++) { !<]%V]5[_
temp = data; !!_K|}QOE
} ?yzhk7j7
for (j = 1; j <= r - mid; j++) { ,St#/tu
temp[r - j + 1] = data[j + mid]; b9[;qqq@'
} qSj2=dlW
int a = temp[l]; _*6nTSL
int b = temp[r]; r_T\%
for (i = l, j = r, k = l; k <= r; k++) { }% JLwN
if (a < b) { T F&xiL^
data[k] = temp[i++]; Z}.N4 /
a = temp; ,"
} else { jdQ`Y+BC
data[k] = temp[j--]; -,Cx|Nl
b = temp[j]; 9_[TYzpB!
} }6.R.*Imz
} X>2_Gol!
} B;[{7J]
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/** bLGgu#
* @param data ex7zg!
* @param l l]inG^s
* @param i R9D<lX0%
*/ JPS22i)P
private void insertSort(int[] data, int start, int len) { q5?g/-_0[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %TdZ_
} MVz=:2)J2
} MhNzmI&`
} %5RY Ea
} U.hV1
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堆排序： p!>FPS
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package org.rut.util.algorithm.support; U 9TEC)
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import org.rut.util.algorithm.SortUtil; k_#ra7zP
{<iIL3\mC
/** :j9{n ,F
* @author treeroot $'dJ+@
* @since 2006-2-2 :\L{S
* @version 1.0 VdQ}G!d
*/ +4f>njARIb
public class HeapSort implements SortUtil.Sort{ wxVf6`
EcrM`E#kaZ
/* (non-Javadoc) V"(S<o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $q]((@i.
*/ .2/(G{}U
public void sort(int[] data) { -fuSCj
MaxHeap h=new MaxHeap(); :pcKww|V
h.init(data); /E$"\md
for(int i=0;i h.remove(); jFpXTy[>
System.arraycopy(h.queue,1,data,0,data.length); 6UR.,*f=
} dG}fpQ3&
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private static class MaxHeap{ +[8s9{1{C
lBh|+KN
void init(int[] data){ U|6ME%xm
this.queue=new int[data.length+1]; Sx+.<]t2A
for(int i=0;i queue[++size]=data; L.>tJ.ID
fixUp(size); )`yxJ;O@$
} *DObtS_ 6
} P!'Sx;C^f
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private int size=0; KB <n-'
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private int[] queue; qyGVyi3
Kf2*|ZHj
public int get() { dQ@e+u5
return queue[1]; Dg%zNi2GS
} 1uz9zhG><
cW;to Q!P
public void remove() { /=>z|?z3
SortUtil.swap(queue,1,size--); :M9'wg
fixDown(1); n^'ip{
} UOSa`TZbZ
file://fixdown tKrr5SRb
private void fixDown(int k) { #qT97NQ
int j; ]Gm,sp.x
while ((j = k << 1) <= size) { }"wWSPD
if (j < size %26amp;%26amp; queue[j] j++; B5*{85p(u
if (queue[k]>queue[j]) file://不用交换 +u' ?VBv
break; U0t/(Jyg
SortUtil.swap(queue,j,k); ?~uTbNR
k = j; B2:6=8<
} 1i4KZ"A5+
} / *xP`'T
private void fixUp(int k) { .9+"rK}u
while (k > 1) { k-xh-&
int j = k >> 1; RoSh|$JF
if (queue[j]>queue[k]) \NKf$"x}
break; 1s8v E f
SortUtil.swap(queue,j,k); 5t#+UR
k = j; su/l'p'
} )Y}t~ Zfx
} Gp'rN}i^
:,%~rR
} 7kx)/Rw\B
cOcF VPQ
} ;0O3b
^'!]|^
SortUtil： .x5Yfe
.pNWpWL.
package org.rut.util.algorithm; )dgXS//Y
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import org.rut.util.algorithm.support.BubbleSort; F2]v]]F!
import org.rut.util.algorithm.support.HeapSort; y[Zl,v7
import org.rut.util.algorithm.support.ImprovedMergeSort; lrB@n?hk
import org.rut.util.algorithm.support.ImprovedQuickSort; /9NQ u
import org.rut.util.algorithm.support.InsertSort; I8@NQ=UV0
import org.rut.util.algorithm.support.MergeSort; &1YqPk
import org.rut.util.algorithm.support.QuickSort; *Uie{^p?
import org.rut.util.algorithm.support.SelectionSort; <:0649ZB
import org.rut.util.algorithm.support.ShellSort; U:m[* }+<
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/** (xpj?zlmM
* @author treeroot ;E>5<[aa
* @since 2006-2-2 wx nD3
* @version 1.0 ^5j|
*/ mv|eEz)r
public class SortUtil { W!8g.r4u+,
public final static int INSERT = 1; }GJIM|7^
public final static int BUBBLE = 2; N ncur]
public final static int SELECTION = 3; B~QX{
public final static int SHELL = 4; 7YsBwo
public final static int QUICK = 5; >Lp^QP1gU
public final static int IMPROVED_QUICK = 6; %l%5Q;t
public final static int MERGE = 7; -hj@^Auf
public final static int IMPROVED_MERGE = 8; #Mw|h^Wm
public final static int HEAP = 9; \c3zK|^
xr+K: bw
public static void sort(int[] data) { |E-/b6G
sort(data, IMPROVED_QUICK); }NW^?37
} NH$%g\GPs
private static String[] name={ )kR~|Yn<-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _+YCwg
}; ,IoPK!5xy
T{3C3EE?]
private static Sort[] impl=new Sort[]{ 5A/8G}'XZ
new InsertSort(), EKoAIC*?p
new BubbleSort(), ac"Pn? q
new SelectionSort(), {.pR$]6B"+
new ShellSort(), pV{MW#e
new QuickSort(), %5V!Fdb
new ImprovedQuickSort(), Jaz|b`KDj
new MergeSort(), Wm$(b2t
new ImprovedMergeSort(), N|K,{ p^li
new HeapSort() Q1J./C}
}; eWzD'3h^
H7n5k,
public static String toString(int algorithm){ eKi/Mt
return name[algorithm-1]; /1 lIV_Z
} s `fIeP
u,e'5,`N
public static void sort(int[] data, int algorithm) { {$z)7s
impl[algorithm-1].sort(data); Q3> 3!FAO
} </F@5*
:W(3<D7\
public static interface Sort { LWE[]1=
public void sort(int[] data); nlJ~Q_E(
} o:B?gDM
. [DCL
public static void swap(int[] data, int i, int j) { /3->TS
int temp = data; _yY(&(]#
data = data[j]; T-ID{i
data[j] = temp; ^_ <jg0V
} #mwV66'H
} R2WEPMH%