[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; <@+L^Ps~z
} NE)w$>0M
int i1=l; xCT2FvX6
int i2=mid+1; d/$e#8
for(int cur=l;cur<=r;cur++){ ",,.xLI7
if(i1==mid+1) Q^l!cL| {
data[cur]=temp[i2++]; Ah5o>ZtcO
else if(i2>r) _,UYbD\[J}
data[cur]=temp[i1++]; 6U%d3"T
else if(temp[i1] data[cur]=temp[i1++]; [)I W9E v
else FB>P39u
data[cur]=temp[i2++]; d.B<1"MQ
} '}(Fj2P79
} m6xbO
M\IdQY-c
} oblw!)
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改进后的归并排序: vMn$lT@
J#iuF'%Ds
package org.rut.util.algorithm.support; wq1s#ag<
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import org.rut.util.algorithm.SortUtil; 5bI4' ;
X(DP=C}v9
/** "@5{=
* @author treeroot `Jj b4]
* @since 2006-2-2 L5 Ai
* @version 1.0 dWwb}r(ky
*/ hg'eSU$J
public class ImprovedMergeSort implements SortUtil.Sort { ^%g8OP
r(wtuD23q
private static final int THRESHOLD = 10; Iq6EoDoq
Dsv2p~
/* z\K%
* (non-Javadoc) a_b+RMy
* By}ZHK94I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,,#6SR(n
*/ %P#| }
public void sort(int[] data) { 7M?Sndp$
int[] temp=new int[data.length]; _@y9=e
mergeSort(data,temp,0,data.length-1); @j%@Z
} q1r-xsjV=
F%%mcmHD#
private void mergeSort(int[] data, int[] temp, int l, int r) { CR#-!_=4
int i, j, k; Z7e"4wA
int mid = (l + r) / 2; AAB_Ytf
if (l == r) Olt;^>MQ
return; j{=}?+M
if ((mid - l) >= THRESHOLD) 7.n\a@I/
mergeSort(data, temp, l, mid); Zx6h%l,%
else gssEdJ
insertSort(data, l, mid - l + 1); Jk{v(W#
if ((r - mid) > THRESHOLD) 4wa3$Pk
mergeSort(data, temp, mid + 1, r); .6bo
else b0se-#+
insertSort(data, mid + 1, r - mid); 3k8.5W
%6M%PR~u
for (i = l; i <= mid; i++) { n}4q2x"
temp = data; 9~K+h/
} 6vJS"+ <
for (j = 1; j <= r - mid; j++) { _ph1( !H$
temp[r - j + 1] = data[j + mid]; nU#K=e =W
} Gs04)KJm<
int a = temp[l]; $h=v;1"
int b = temp[r]; vJx( lU`Y
for (i = l, j = r, k = l; k <= r; k++) { 8Vt'X2
if (a < b) { {\LLiU}MJC
data[k] = temp[i++]; } z7yS.{
a = temp; mU||(;I
} else { -ni@+Dy
data[k] = temp[j--]; a/%qn-i|p
b = temp[j]; "#f5jH
} -h8Z@r~a/
} 6D{70onY+
} uX1{K%^<TW
,eqRI>,\
/** X?`mYoe
* @param data Ggv*EsN/cC
* @param l %Z*)<[cIE0
* @param i KXWz(L!1
*/ n \&H~0X
private void insertSort(int[] data, int start, int len) { /WX&UAG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v9t'CMU
} sULsUt#
} Q(BZg{
} YNp-A.o W@
} Ou f\%E<
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堆排序： C}9|e?R[Rz
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package org.rut.util.algorithm.support; ,hT**(W
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import org.rut.util.algorithm.SortUtil; {q~N$"#
tejpY
/** 'Ir
* @author treeroot mFd|JbW
* @since 2006-2-2 KyqP@ {
* @version 1.0 AF{@lDa1h
*/ 6hXh;-U
public class HeapSort implements SortUtil.Sort{ 6_g6e2F
YelF)Na
/* (non-Javadoc) {?3i^Q=V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l#p?lBm1
*/ <v\x<ul6
public void sort(int[] data) { rQPO+
MaxHeap h=new MaxHeap(); t+0/$
h.init(data); AthR|I|8
for(int i=0;i h.remove(); Ch~y;C&e+r
System.arraycopy(h.queue,1,data,0,data.length); [V5,1dmkI
} yv)-QIC3
/7-FVqDx8
private static class MaxHeap{ 'Q.5`o
0AhUH|]
void init(int[] data){ 0p\Kf(|E*6
this.queue=new int[data.length+1]; 'RV wxd
for(int i=0;i queue[++size]=data; A43[i@o
fixUp(size); Kc>Rd
} p DU+(A4>
} VArMFP)cz
)"E1/$*k
private int size=0; |n(b>.X
#!r>3W&
private int[] queue; /c7jL4oD
7sVO?:bj}
public int get() { P(LiH
return queue[1]; DKl\N~{F
} y'^b{q@
/<o?T{z<-
public void remove() { $:vS_#
SortUtil.swap(queue,1,size--); R+Ug;r-[
fixDown(1); T~?&hZ>
} 4:kDBV;v
file://fixdown 1ZvXRJ)%
private void fixDown(int k) { koj*3@\p/
int j; gf/<sH2}
while ((j = k << 1) <= size) { fA),^
if (j < size %26amp;%26amp; queue[j] j++; zIU6bMMT3u
if (queue[k]>queue[j]) file://不用交换 A "'h0D
break; bGlr>@;-r
SortUtil.swap(queue,j,k); (!Fu5m=<8
k = j; ~P*{%=a
} aQj6XGu
} H*",'`|-
private void fixUp(int k) { l o- 42)
while (k > 1) { j& L@L.d
int j = k >> 1; ~O3VX75f
if (queue[j]>queue[k]) w@,v$4Oi
break; mZjP;6
SortUtil.swap(queue,j,k); (/i|3P
k = j; RgzzbW
} YH{n
} 0}g~69Z1=
F-D$Y?m
} &NI\<C7_Gw
Xl>ZnI];
} -L wz T
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SortUtil： 6O*lZNN
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package org.rut.util.algorithm; +\>op,_9I
Q>L.
import org.rut.util.algorithm.support.BubbleSort; @q{.shqo
import org.rut.util.algorithm.support.HeapSort; k#8E9/t@
import org.rut.util.algorithm.support.ImprovedMergeSort; GB)< 5I
import org.rut.util.algorithm.support.ImprovedQuickSort; w)/~Gn676
import org.rut.util.algorithm.support.InsertSort; y%<CkgZS
import org.rut.util.algorithm.support.MergeSort; NA#,q 8
import org.rut.util.algorithm.support.QuickSort; ZRFHs>0
import org.rut.util.algorithm.support.SelectionSort; :fnK`RnaQ
import org.rut.util.algorithm.support.ShellSort; 6 8Vxy
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/** vxrqUjK7
* @author treeroot Mh}vr%0;)
* @since 2006-2-2 Qzv&
* @version 1.0 zbvV:9N
*/ -Q%Pg<Q-#
public class SortUtil { SES-a Mi3
public final static int INSERT = 1; Na+h+wD.D
public final static int BUBBLE = 2; !y$+RA7\
public final static int SELECTION = 3; VaO[SW^
public final static int SHELL = 4; !;Pp)SRzKG
public final static int QUICK = 5; JX#0<U|L
public final static int IMPROVED_QUICK = 6; |vxmgX)
public final static int MERGE = 7; bfK4ps}m*
public final static int IMPROVED_MERGE = 8; .k|\xR
public final static int HEAP = 9; va0}?fy.O%
VWqZ`X
public static void sort(int[] data) { J58S8:c
sort(data, IMPROVED_QUICK); ^RYq !l$
} Nc?'},
private static String[] name={ 3L{)Y`P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lA4TWU (]
}; n`T4P$pt
Bz>5OuOVS\
private static Sort[] impl=new Sort[]{ ,MG`}*N}
new InsertSort(), WDt6{5T
new BubbleSort(), *0<)PJ T
new SelectionSort(), F]s:`4
new ShellSort(), x_wWe>0
new QuickSort(), `dRqheX
new ImprovedQuickSort(), F;BCSoO4
new MergeSort(), uhB V)Qg
new ImprovedMergeSort(), X<g }F[Y
new HeapSort() `X<a(5[vV3
}; 4EaxU !BT
ieXi6^M$
public static String toString(int algorithm){ 8uA!Vrp3
return name[algorithm-1]; 'UC1!Z
} %pf9Yd0t
Af`Tr6)
public static void sort(int[] data, int algorithm) { z8xBq%97us
impl[algorithm-1].sort(data); Wmx3@]<
} +M<W8KF
A>_,tt
public static interface Sort { Y)l=r^Ap>
public void sort(int[] data); J :KU~`r
} Ns5P,[pBOZ
-x|!?u5F
public static void swap(int[] data, int i, int j) { s5)y%,E
int temp = data; %N0m$*
data = data[j]; dAy\IfZX=
data[j] = temp; M;YJpi
} 32`Z3-
} WADEDl&,'