[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; #l3)3k*;
} Q(e
int i1=l; @~UQU)-(
int i2=mid+1; _-9cGm v
for(int cur=l;cur<=r;cur++){ -~X[j2
if(i1==mid+1) {];-b0MS~
data[cur]=temp[i2++]; A5%$<
else if(i2>r) kQQDaZ8
data[cur]=temp[i1++]; =q`T|9v
else if(temp[i1] data[cur]=temp[i1++]; Fmz+ Xb
else ~-B+7
data[cur]=temp[i2++]; Nd{U|k3pL
} 9.il1mAKg
} mVh;=>8K
NK(_ &.F
} ;oDr8a<A
8F@Sy,D
改进后的归并排序: DH.UJ+
?,8+1"|$A]
package org.rut.util.algorithm.support; x}V&v?1{5
I3d}DpPx%
import org.rut.util.algorithm.SortUtil; lBAu@M
a60rJ#GD
/** sf->8
* @author treeroot R^P>yk8
* @since 2006-2-2 As`=K$^Il.
* @version 1.0 4l68+
*/ Id>4fF:o
public class ImprovedMergeSort implements SortUtil.Sort { Ym!e}`A\F
zNdkwj p+
private static final int THRESHOLD = 10; j0V/\Ep)T<
%'Q2c'r
/* ela^L_NhF
* (non-Javadoc) <JU3sXl
* 85;bJfY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CH 29kQ
*/ W I MBwmg
public void sort(int[] data) { rDa{Ve
int[] temp=new int[data.length]; &>E gKL
mergeSort(data,temp,0,data.length-1); +@?'dw
} Y:t?W
9OW8/H&!
private void mergeSort(int[] data, int[] temp, int l, int r) { ;l ZKgi8`
int i, j, k; 3}F>t{FDk
int mid = (l + r) / 2; '?L^Fa_H
if (l == r) v^8sL` F
return; $T^q>v2u
if ((mid - l) >= THRESHOLD) 4gsQ:3
mergeSort(data, temp, l, mid); kP ,8[r
else vZ"gCf3#?3
insertSort(data, l, mid - l + 1); qqf*g=f
if ((r - mid) > THRESHOLD) !]82$
mergeSort(data, temp, mid + 1, r); Rqp#-04*W
else z+{qQ!
insertSort(data, mid + 1, r - mid); ^MF 2Q+
tZz%x?3G
for (i = l; i <= mid; i++) { -OlrA{=c_
temp = data; -P/DmSS8V
} 9&AO
for (j = 1; j <= r - mid; j++) { )`f-qTe
temp[r - j + 1] = data[j + mid]; aaT3-][
} W/>a 1
int a = temp[l]; to</
int b = temp[r]; ]0ErT9
for (i = l, j = r, k = l; k <= r; k++) { _#:7S sJ
if (a < b) { PENB5+1OK
data[k] = temp[i++]; Sq ]gU
a = temp; jgIG";:Q
} else { cOX)+53
data[k] = temp[j--]; 4A6Y \ZXI
b = temp[j]; 8TT#b?d
} Pg(Y}Tu
} d\]KG(T
} PR:B6 F8
v7wyQx+Q
/** =CK%Zo
* @param data }%/mPbd#
* @param l ~rdS#f&R2
* @param i aO&{.DO2
*/ W6NhJ#M7
private void insertSort(int[] data, int start, int len) { _Fa\y ZX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y 2> 93m
} bXF8V
} >B**fZ~L
} |kPgXq6
} Q!@M/@-Ky
B]G2P`sN
堆排序： `+n#CWZ"Y
M1-tRF
package org.rut.util.algorithm.support; xz!0BG
7CH&n4v
import org.rut.util.algorithm.SortUtil; %"Um8`]FVg
e&VC}%m
/** =|1_6.tz
* @author treeroot ^7aqe*|vm
* @since 2006-2-2 z.-yL,Rc`-
* @version 1.0 xn2nh@;
*/ it\$Pih]
public class HeapSort implements SortUtil.Sort{ =M;F&;\8
?m]vk|>
/* (non-Javadoc) Az:~|P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lOVcXAe}
*/ @iuX~QA[9
public void sort(int[] data) { 6I"KomJ9
MaxHeap h=new MaxHeap(); QvZ"{
h.init(data); ';FJs&=I
for(int i=0;i h.remove(); lu"0\}7X
System.arraycopy(h.queue,1,data,0,data.length); #wIWh^^ Zy
} -z`FKej
U|Fqna
private static class MaxHeap{ md+pS"8o;
G]rY1f0
void init(int[] data){ +=E\sEe
this.queue=new int[data.length+1]; 5`p9Xo>)yW
for(int i=0;i queue[++size]=data; >va_,Y}
fixUp(size); ,@f"WrQ
} C;m"W5+
} Qpmq@iL
0QZT<Zs
private int size=0; <7U~0@<Y
"ZGP,=?y2
private int[] queue; 8C*@d_=q
USyc D`
public int get() { JGHj(0j
return queue[1]; *xNc^&.
} ;9z|rWsF
?3BcjD0
public void remove() { 9{;L7`<
SortUtil.swap(queue,1,size--); ASbIc"S6
fixDown(1); 6a,8t
} >IaGa!4
file://fixdown pL{oVk#,
private void fixDown(int k) { aNu.4c/5
int j; *`+zf7-f
while ((j = k << 1) <= size) { p($vM^_<"
if (j < size %26amp;%26amp; queue[j] j++; nvrh7l9nX
if (queue[k]>queue[j]) file://不用交换 jyIIE7.I"
break; mh}D[K=~%
SortUtil.swap(queue,j,k); &q<k0_5Q
k = j; A^z{n/DiL
} N0S^{j,i
} _" 9 q(1
private void fixUp(int k) { l0,VN,$Yl
while (k > 1) { ^~V2xCu!
int j = k >> 1; bI ;I<Qa
if (queue[j]>queue[k]) Nt$4;
break; <w^u^)iLy1
SortUtil.swap(queue,j,k); ExtC\(X;
k = j; GrG'G(NQ
} +45SKu=
} 4:rwzRDY
i+O7,"(@
} .*`^dt
![B|Nxq}@
} Xsa8YP9
'EIe5Op
SortUtil： b_TI_
f\oW<2k]~
package org.rut.util.algorithm; } TUr96
&7\}Sqp
import org.rut.util.algorithm.support.BubbleSort; F6sQeU
import org.rut.util.algorithm.support.HeapSort; KE,.Evyu=
import org.rut.util.algorithm.support.ImprovedMergeSort; =i vlS
import org.rut.util.algorithm.support.ImprovedQuickSort; ;&=jSgr8
import org.rut.util.algorithm.support.InsertSort; =%~- M
import org.rut.util.algorithm.support.MergeSort; K[iAN;QCe%
import org.rut.util.algorithm.support.QuickSort; `\VtTS
import org.rut.util.algorithm.support.SelectionSort; gamB]FPZ
import org.rut.util.algorithm.support.ShellSort; A2gFY}
m OUO)[6y
/** P+f}r^4}
* @author treeroot Mbxl{M >
* @since 2006-2-2 GwF8ze+cH
* @version 1.0 8i[TeW"
*/ *l`yxz@U
public class SortUtil { `_cv& "K9f
public final static int INSERT = 1; yQ/O[(
public final static int BUBBLE = 2; \r:*`Z*y
public final static int SELECTION = 3; &UH0Tw4
public final static int SHELL = 4; ?S& yF
public final static int QUICK = 5; J#C4A]A
public final static int IMPROVED_QUICK = 6; +#wVe
public final static int MERGE = 7; _}[WX[Le{
public final static int IMPROVED_MERGE = 8; AsE77AUA
public final static int HEAP = 9; r1 :TM|5L
<6-73LsHcP
public static void sort(int[] data) { Z]uc *Ed
sort(data, IMPROVED_QUICK); {,5.svO
} R5e[cC8o.
private static String[] name={ l/(~Kf9eQG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;N.dzH2yA
}; ggPGKY-b=
4RDY_HgF6
private static Sort[] impl=new Sort[]{ *-=/"m
new InsertSort(), &Y1h=,KR9
new BubbleSort(), f4pIF"U9>
new SelectionSort(), g8E5"jpXx3
new ShellSort(), a^LckHPI>
new QuickSort(), ZB1%Kn#zo4
new ImprovedQuickSort(), MD$W;rk(Hn
new MergeSort(), Vf:.C|Z
new ImprovedMergeSort(), pmBN?<
new HeapSort() w!<e#Z]3b
}; !x-__[#
3M?O(oO
public static String toString(int algorithm){ %1p-DX6
return name[algorithm-1]; %Y0lMNP
} 7Ku&Q<mi
1v:Ql\^cT
public static void sort(int[] data, int algorithm) { 4I&(>9 @z<
impl[algorithm-1].sort(data); rNhS\1-
} rF[-4t %
c*\i%I#f2
public static interface Sort { j7E;\AZ^
public void sort(int[] data); vKW!;U9~P
} OMk3\FV2Z
8Y8bFWuc
public static void swap(int[] data, int i, int j) { rr,A Vw
int temp = data; ;/V])4=
data = data[j]; #Ev}Gf+5Q
data[j] = temp; #@-dT,t
} .0yBI=QI
} [L-wAk:Fb