[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; R]OpQ[k
} {DU`[:SQZg
int i1=l; .q9 $\wM/
int i2=mid+1; 2$?C7(kW
for(int cur=l;cur<=r;cur++){ p3 w
if(i1==mid+1) 0BIy>wy:
data[cur]=temp[i2++]; 2^^`n1?'
else if(i2>r) &;D8]7d
data[cur]=temp[i1++]; JBJhG<J
else if(temp[i1] data[cur]=temp[i1++]; ft$RSb#
else /lo2y?CS*
data[cur]=temp[i2++]; ^:#D0[
} GH+r?2<
} Zn ''_fjh
QV{}K
} W7 Cc
cIav&Zko
改进后的归并排序: VO$ iNK
rcMwFE?|xq
package org.rut.util.algorithm.support; TMig-y*[
m|{3),#V
import org.rut.util.algorithm.SortUtil; w,h`s.AN
F)W:
/** rd9e \%A
* @author treeroot *QLI3B9V
* @since 2006-2-2 j#+!\ft5
* @version 1.0 7cTV?nc
*/ CaL\fZ
public class ImprovedMergeSort implements SortUtil.Sort { pov)Z):}G<
a{R%#e\n
private static final int THRESHOLD = 10; {buo^kgj`]
vJ'2@f$
/* YhDtUt}?
* (non-Javadoc) 8DegN,?
* ptU\[Tq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %`r?c<P}
*/ UPG9)aF
public void sort(int[] data) { 1(|'WyD
int[] temp=new int[data.length]; mGJasn
mergeSort(data,temp,0,data.length-1); BFo5\l:q8
} R'C2o]
Kjs.L!W
private void mergeSort(int[] data, int[] temp, int l, int r) { `QyO`y=?[Y
int i, j, k; 4A_[PM
int mid = (l + r) / 2; m+lvl
if (l == r) a=hxJ1O
return; hM{{\yZS
if ((mid - l) >= THRESHOLD) :TJv=T'p'
mergeSort(data, temp, l, mid); 'H \9:7
else U$_xUG
insertSort(data, l, mid - l + 1); EUN81F?
if ((r - mid) > THRESHOLD) [3{W^WSOz
mergeSort(data, temp, mid + 1, r); a{ ?`t|
else ug+io mZ
insertSort(data, mid + 1, r - mid); kPF9Z "l
X@K-^8
for (i = l; i <= mid; i++) { 1T-8K r
temp = data; \}p6v}
} fjs [f'L
for (j = 1; j <= r - mid; j++) { .ys6"V|31
temp[r - j + 1] = data[j + mid]; SVO3821
} Il= W,/y
int a = temp[l]; r=X}%~_8X
int b = temp[r]; %l,,_:7{
for (i = l, j = r, k = l; k <= r; k++) { rdJ d#S
if (a < b) { }>VG~u8
data[k] = temp[i++]; ]>~)<
a = temp; u%$Zqee
} else { Q4f/Z
data[k] = temp[j--]; <;#~l*
b = temp[j]; n~A%q,DmF
} 1e&QSzL
} W!?7D0q
} iy14mh\ ~
;)!Sp:mHX
/** rmE"rf
* @param data B,TB3 {
* @param l \Dd-Xn_b
* @param i HA2k[F@3^
*/ BbgnqzU
private void insertSort(int[] data, int start, int len) { pBETA'fY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +;#Y]xy:
} a^=-Mp
} Y@b.sMg{
} uoXAQ6k
} >|twyb
O }(VlR2
堆排序： jz5qQt]^
ad:&$
package org.rut.util.algorithm.support; xv&Q+HD
brdmz}
import org.rut.util.algorithm.SortUtil; ,ztI,1"k
q~*t@
/** FvJd8kV
* @author treeroot sK7+Q
* @since 2006-2-2 *{yK 8
* @version 1.0 69J4=5lX
*/ 4Rvf
public class HeapSort implements SortUtil.Sort{ ;ByOth|9P
JXu$ew>q
/* (non-Javadoc) '*?WU_L(g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DBCK2PlJ
*/ qHP78&wUx
public void sort(int[] data) { `$B3X
MaxHeap h=new MaxHeap(); U )l,'y2
h.init(data); @)-$kk*
for(int i=0;i h.remove(); JM\m)RH0
System.arraycopy(h.queue,1,data,0,data.length); /l<<_uk$
} ea~:}!-P
<]b7ZF]
private static class MaxHeap{ ]- 4QNc=
"B8"_D&
void init(int[] data){ NN1$'"@NL
this.queue=new int[data.length+1]; K"[AxB'F
for(int i=0;i queue[++size]=data; YBP:q2H
fixUp(size); ZG du|
} ,i,q!M{-
} cPU/tkc
YI.w-K\
private int size=0; l+g9 5mjP
mBG=jI "xh
private int[] queue; hweaGL t0
6^c>,.R
public int get() { jD`d#R
return queue[1]; ZU9c 5/J
} GR"Eas.$
f}@jFhr'<
public void remove() { Q]w&N30
SortUtil.swap(queue,1,size--); <@Fy5k-%.
fixDown(1); @bnG:np
} 8-Hsgf.*
file://fixdown pIKSs<IP
private void fixDown(int k) { XFh>U7z.
int j; aKd+CO:
while ((j = k << 1) <= size) { V2<?ol
if (j < size %26amp;%26amp; queue[j] j++; d'|,[p
if (queue[k]>queue[j]) file://不用交换 -#Z bR
break; j$TwL;
SortUtil.swap(queue,j,k); ph#tgLJ
k = j; ,E$@=1)
} vQa'S-@u
} 60)iw4<wf
private void fixUp(int k) { w1|A5q'M
while (k > 1) { ;9}pOzF1q
int j = k >> 1; %Jf<l&K.`
if (queue[j]>queue[k]) q9^
break; A;O~#Chvd
SortUtil.swap(queue,j,k); ?*oKX
k = j; Zxb_K
} d|*"IFe
} .<K iMh
!!:LJ
} 3w!c`;c%
PccB]
} ZJjTzEV%^B
7 uarh!
SortUtil： xwH?0/
F>X-w+b4r
package org.rut.util.algorithm; Jy aag-
R+~cl;#G6
import org.rut.util.algorithm.support.BubbleSort; lMz<s
import org.rut.util.algorithm.support.HeapSort; P\&! ]
import org.rut.util.algorithm.support.ImprovedMergeSort; \bx~*FaX
import org.rut.util.algorithm.support.ImprovedQuickSort; Dr9 ?2
import org.rut.util.algorithm.support.InsertSort; ?~QIALA
import org.rut.util.algorithm.support.MergeSort; L}yyaM)
import org.rut.util.algorithm.support.QuickSort; sncIqsZ
import org.rut.util.algorithm.support.SelectionSort; dk==?
import org.rut.util.algorithm.support.ShellSort; T'fcc6D5p
e62Dx#IY
/** $y?k[Y-~
* @author treeroot ]}UgS+g>$
* @since 2006-2-2 CZEW-PIhj
* @version 1.0 =q"eU=9
*/ Sc]P<F7N]
public class SortUtil { oR*=|B
public final static int INSERT = 1; ./p|?pu
public final static int BUBBLE = 2; #2tCV't
public final static int SELECTION = 3; T|"7sPgGR
public final static int SHELL = 4; L}j0a>=x4
public final static int QUICK = 5; - /c7nF
public final static int IMPROVED_QUICK = 6; c[ht`!P
public final static int MERGE = 7; <fdPLw;@e4
public final static int IMPROVED_MERGE = 8; IOK}+C0e
public final static int HEAP = 9; T#O??3/%$1
'ho{eR@d
public static void sort(int[] data) { htPqT,L
sort(data, IMPROVED_QUICK); |8)Xc=Hz
} fRm}S>Nibb
private static String[] name={ jvzBh-!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WjMS5^ _
}; M)cGz$Q|
$cVi;2$p
private static Sort[] impl=new Sort[]{ ^UA(HthY
new InsertSort(), X;!D};;M
new BubbleSort(), $gMCR b,
new SelectionSort(), wE).>
new ShellSort(), o7+>G~i
new QuickSort(), _N3}gFh>
new ImprovedQuickSort(), &!35/:~uD
new MergeSort(), mh;X~.98
new ImprovedMergeSort(), NfE.N&vI_c
new HeapSort() %McO6.M@
}; B(l-}|m_
cbKL$|
public static String toString(int algorithm){ TD04/ ISHT
return name[algorithm-1]; &k T"oK
} P ,K\
S:Tm23pe
public static void sort(int[] data, int algorithm) { LEh)g[
impl[algorithm-1].sort(data); -cNx1et
} AV@\ +0
1h"_[`L'
public static interface Sort { ][Y^-Ak1
public void sort(int[] data); }gsO&g"8
} d^39t4
X9~m8c){z
public static void swap(int[] data, int i, int j) { R V!o4"\]
int temp = data; DM3B]Yl
data = data[j]; !v!N>f4S$
data[j] = temp; b2h":G|s
} L)-*,$#<oW
} #Y[H8TW