[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; 6h\; U5
} ;Udx|1o
int i1=l; ZrWA,~;
int i2=mid+1; MnptC 1N
for(int cur=l;cur<=r;cur++){ dAjm4F-
if(i1==mid+1) lK#uyag
data[cur]=temp[i2++]; "}uV=y
else if(i2>r) o7yvXrpG(U
data[cur]=temp[i1++]; w X.]O!^X~
else if(temp[i1] data[cur]=temp[i1++]; KU_""T
else {%X[Snv
data[cur]=temp[i2++]; u/5)Yx+5_
} PxJvE*6^H
} XZ|\|(6Cc
>W'"xK|:
} _147d5
_No<fz8
改进后的归并排序: "GAKi}y">v
CbT ;#0
package org.rut.util.algorithm.support; s18A
(z%OK[
import org.rut.util.algorithm.SortUtil; =%+xNOdN7?
r#^uY:T%
/** ^i17MvT'
* @author treeroot 4TaHS!9
* @since 2006-2-2 6H|&HV(!R
* @version 1.0 _(KzjOMt
*/ ,^qHl+'
public class ImprovedMergeSort implements SortUtil.Sort { !]P=v`B.
,L8(Vo`-
private static final int THRESHOLD = 10; L>,xG.oG
4HyD=6V#
/* zB+zw\ncN
* (non-Javadoc) 05;J7T<
* iD:TKB_r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8*(|uX
*/ E1|:t$>Ld
public void sort(int[] data) { /Fp@j/50
int[] temp=new int[data.length]; Qf|c^B
mergeSort(data,temp,0,data.length-1); UFr5'T
} ?;p45y~n%
k i{8f
private void mergeSort(int[] data, int[] temp, int l, int r) { mB*;>
int i, j, k; f_> lz
int mid = (l + r) / 2; \2)~dV:6+
if (l == r) HO39>:c
return; IPlkv{^
if ((mid - l) >= THRESHOLD) NQ\<~a`Eq
mergeSort(data, temp, l, mid); (APGz,^9#
else 2;YL+v2
insertSort(data, l, mid - l + 1); <7J\8JR&=
if ((r - mid) > THRESHOLD) EBplr ,
mergeSort(data, temp, mid + 1, r); x]|-2t
else h=ko_/<
insertSort(data, mid + 1, r - mid); 9H~OC8R:
fb|lWEw5h.
for (i = l; i <= mid; i++) { P64<O5l/
temp = data; o1u?H4z
} lhJZPnx~
for (j = 1; j <= r - mid; j++) { DX8pd5U
temp[r - j + 1] = data[j + mid]; mbO.Kyfen
} MrpT5|t
int a = temp[l]; Bfr$&?j#
int b = temp[r]; etH]-S
for (i = l, j = r, k = l; k <= r; k++) { b$eZ>X
if (a < b) { =7<g;u
data[k] = temp[i++]; DsGtc<l%
a = temp; %weG}gCM
} else { Xh"8uJD
data[k] = temp[j--]; A$o?_
b = temp[j]; Z66q0wR7
} 6?KJ"Ai9
} 9Zpd=m8dU
} O4Hc"v
"TePO7^m
/** @#&y
* @param data UU]a).rz
* @param l ;bes#|^F
* @param i K1^x+I7%U[
*/ i@STo7=
private void insertSort(int[] data, int start, int len) { l*<RKY8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !;;WS~no3
} ~!TRR.
} SHP_
} }`$Sr&n 1
} 2$gOe^ &
c*`=o(S
堆排序： ma(E}s
\*6Ld%:h$
package org.rut.util.algorithm.support; SpiI9)gp
84u%_4/
import org.rut.util.algorithm.SortUtil; W&8)yog.
o<8=@ ^T
/** @If ^5s;z
* @author treeroot $&[}+??
* @since 2006-2-2 a 9f%p
* @version 1.0 e`Vb.E)
*/ ![4<6/2gy
public class HeapSort implements SortUtil.Sort{ WEFvJ0]
0'4V*Y
/* (non-Javadoc) E]j2%}6Z%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0*}%v:uN9
*/ *&lNzz5&
public void sort(int[] data) { e|jmOYWG
MaxHeap h=new MaxHeap(); _qQB.Dzo:
h.init(data); JVeb$_0k
for(int i=0;i h.remove(); o&b1-=MC2
System.arraycopy(h.queue,1,data,0,data.length); x7l3&;yDv
} XhEd9>#
Pn|*(sTl
private static class MaxHeap{ }qOj^pkJ
*%wfR7G[B
void init(int[] data){ }hd:avze
this.queue=new int[data.length+1]; QvN=<V
for(int i=0;i queue[++size]=data; 'CSIC8M<j
fixUp(size); }tRY,f
} P(#by{s
} jLu`DKB
^q=D!g
private int size=0; bhWH
cy-Bhk0H
private int[] queue; o:irwfArv
Ysz&/ry
public int get() { B1!b@0^
return queue[1]; ow{SsX
} Mk~]0d
kxp, ZP
public void remove() { {Ex*8sU%p%
SortUtil.swap(queue,1,size--); N1O.U"L;
fixDown(1); 6(uK5eD(!n
} -1 Ok_h"
file://fixdown >u:t2DxE
private void fixDown(int k) { s]z-d!G
int j; ^ A`@g4!
while ((j = k << 1) <= size) { !K~:crUV|S
if (j < size %26amp;%26amp; queue[j] j++; w[S!U<9/
if (queue[k]>queue[j]) file://不用交换 xbv
break; - s,M+Q(<
SortUtil.swap(queue,j,k); a*Oc:$
k = j; 0[qU k(=}[
} 6cV -iDOH
} |*+f N8
private void fixUp(int k) { Mr3;B+S
while (k > 1) { =E?!!EIq.
int j = k >> 1; ;/Z9M"!u[
if (queue[j]>queue[k]) x!08FL)
break; ~K-c-Zs#z
SortUtil.swap(queue,j,k); N=QeeAI}}m
k = j; dMnJ)R
} CAhkv0?8
} z"@yE*6
D~i m1h;>
} !6UtwCVR
DKG%z~R*
} Wp[R$/uT
c3>#.NP_
SortUtil： "XEKoeG{
$]Vvu{
package org.rut.util.algorithm; w,t>M_(N
v&NC` dVR
import org.rut.util.algorithm.support.BubbleSort; ]}~[2k.
import org.rut.util.algorithm.support.HeapSort; &GC`4!H
import org.rut.util.algorithm.support.ImprovedMergeSort; g0P^O@8
import org.rut.util.algorithm.support.ImprovedQuickSort; x!A.**
import org.rut.util.algorithm.support.InsertSort; 0?tn.<'B8T
import org.rut.util.algorithm.support.MergeSort; J4Ix\r_
import org.rut.util.algorithm.support.QuickSort; *P#okwp
import org.rut.util.algorithm.support.SelectionSort; d&dp#)._8
import org.rut.util.algorithm.support.ShellSort; %)Pn<! L
'ow`ej
/** 8%dE$smH
* @author treeroot Tw!]N%E
* @since 2006-2-2 wIv_Z^%V
* @version 1.0 8e`'Ox_5a
*/ dsx'l0q 'i
public class SortUtil { UKBVCAK
public final static int INSERT = 1; $R'
public final static int BUBBLE = 2; 4+Sq[Rv0
public final static int SELECTION = 3; hpxqL%r
public final static int SHELL = 4; LG0z|x(
public final static int QUICK = 5; vakAl;
public final static int IMPROVED_QUICK = 6; &:i|;^^2
public final static int MERGE = 7; :Kl~hzVSOa
public final static int IMPROVED_MERGE = 8; [/s^(2%
public final static int HEAP = 9; v[r5!,F
FJ|6R(T_
public static void sort(int[] data) { P,2FH2Eyj
sort(data, IMPROVED_QUICK); BrdHTk= Vy
} bOt6q/f
private static String[] name={ 8| 6:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s)=fs#%
}; y|BRAk&n
^ di[J^
private static Sort[] impl=new Sort[]{ yEnurq%J
new InsertSort(), u}eqU%
new BubbleSort(), _&Hq`KJm
new SelectionSort(), IA\CBwiLj
new ShellSort(), ,X[lC\1a
new QuickSort(), qP"+SVqC
new ImprovedQuickSort(), -'j_JJ
new MergeSort(), /AJ#ngXz
new ImprovedMergeSort(), 6;02_C]\o
new HeapSort() 2;Ij~~
}; Ue>;h9^
@l7~Zn
public static String toString(int algorithm){ p[Pa(a,B7
return name[algorithm-1]; U>bmCK2
} j4ARGkK5B
?onaJ=mT
public static void sort(int[] data, int algorithm) { 8i H'cX
impl[algorithm-1].sort(data); EJM6TI"
} 5B&#Sh`r
1Na*7|
public static interface Sort { C%$:Oq
public void sort(int[] data); G:W4<w
} }@kD&2
z=}@aX[
public static void swap(int[] data, int i, int j) { ~ .}
int temp = data; I<v1S
data = data[j]; ,_STt)
data[j] = temp; 3{gD'y4j
} q5jLK)
} b51{sL