[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; w^09|k
} T!eb=oy
int i1=l; Jq)!)={
int i2=mid+1; #imMkvx?
for(int cur=l;cur<=r;cur++){ {,p<!Jq~G
if(i1==mid+1) 5DKR1z:
data[cur]=temp[i2++]; b`E'MX_ m
else if(i2>r) 3e$&rpv
data[cur]=temp[i1++]; yjZxD[ Z
else if(temp[i1] data[cur]=temp[i1++]; HgY"nrogt$
else dE2(PQb*P
data[cur]=temp[i2++]; X"<t3l(+
} dV#h~
} 0%.l|~CE&
ZK4/o
} jvn:W{'Q
%76N$`{u
改进后的归并排序: n\aG@X%oq
f,z_|e
package org.rut.util.algorithm.support; }./__gJ
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import org.rut.util.algorithm.SortUtil; S!o!NSn@1
Ro`Hm8o/
/** {4tJT25
* @author treeroot [aX'eMq
* @since 2006-2-2 bJ~]nj 3
* @version 1.0 GYYk3\r
*/ *b9=&:pU(
public class ImprovedMergeSort implements SortUtil.Sort { jLc4D'
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private static final int THRESHOLD = 10; ?fcQd6-}
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/* 4'bup h1(
* (non-Javadoc) \M1-
* 0}jB/Z_T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DWZ!B7Ts
*/ H `Fe|6I&
public void sort(int[] data) { 9r%O
int[] temp=new int[data.length]; <e|I?zI9-
mergeSort(data,temp,0,data.length-1); {Cnz7TVB
} -sl] funRy
X2!vC!4P?L
private void mergeSort(int[] data, int[] temp, int l, int r) { 5F$ elW
int i, j, k; # (B <n
int mid = (l + r) / 2; GQO}E@W6C
if (l == r) .0;Z:x_3
return; ~=i9]%g?
if ((mid - l) >= THRESHOLD) ~7T]l1]W%
mergeSort(data, temp, l, mid); VqLqj$P
else ;_)&#X,?(
insertSort(data, l, mid - l + 1); #:v}d+
if ((r - mid) > THRESHOLD) JX@/rXFY}
mergeSort(data, temp, mid + 1, r); 37Vs9w
else `~QS3zq
insertSort(data, mid + 1, r - mid); GGsDR%U
ZFh2v]|!
for (i = l; i <= mid; i++) { _M= \s>;G
temp = data; dX-Xzg
} 82Dw,Cn
for (j = 1; j <= r - mid; j++) { %JmSCjt`G
temp[r - j + 1] = data[j + mid]; z/aZD\[_
} PX}YDC zP$
int a = temp[l]; hSE\RX 9
int b = temp[r]; hl?G_%a
for (i = l, j = r, k = l; k <= r; k++) { U7(84k\j
if (a < b) { C]K|;VQ
data[k] = temp[i++]; Hrm^@3
a = temp; z/(^E8F
} else { E9t[Mb %0
data[k] = temp[j--]; }N!I|<"/
b = temp[j]; ju`x
} lAz.I
} u{maE ,
} 4~=/CaG~
V9qA.NV2
/** ,[&@?
* @param data 0q(}nv
* @param l EOWLGleD1
* @param i JlJy3L8L
*/ +DFG762
private void insertSort(int[] data, int start, int len) { k\X1`D}R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sui3(wb
} q"4{GCavN
} <5 G+(vP
} < I[ Vv'x
} p=_K P9
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堆排序： Kf#9-.}?
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package org.rut.util.algorithm.support; VJ;4~WgBz
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import org.rut.util.algorithm.SortUtil; f"j~{b7
:r*skV|
/** OI</o0Ca
* @author treeroot 1TeYA6 t
* @since 2006-2-2 zLdi
* @version 1.0 EEmYfP[3
*/ E4~k)4R
public class HeapSort implements SortUtil.Sort{ fOs}5J
gB,~Y511
/* (non-Javadoc) "b5:6\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )OxcJPo
*/ -@f5d
public void sort(int[] data) { eSNi6RvE
MaxHeap h=new MaxHeap(); '=}F}[d"kk
h.init(data); J P'|v"
for(int i=0;i h.remove(); &y"e|aE
System.arraycopy(h.queue,1,data,0,data.length); Y}BT| "
} JJ_77i
,;9byb
private static class MaxHeap{ <hazrKUn
+ >?"P^
void init(int[] data){ gwwYz]'d>r
this.queue=new int[data.length+1]; jy#'oadS?
for(int i=0;i queue[++size]=data; z)N8#Y~vn
fixUp(size); |9cJO@
} }_m/3*x_
} ]Gm"U!h*
p\T.l<p
private int size=0; 70IBE[T&
>DqV^%2l
private int[] queue; g9~>mJR
ak]:ir`o
public int get() { <yE
return queue[1]; CqGi 2<2
} &' E(
MBZ/Pzl~
public void remove() { *mH++3h
SortUtil.swap(queue,1,size--); P5/\*~}
fixDown(1); _s{on/u
} #1c%3KaZI
file://fixdown e7rD,`NiV
private void fixDown(int k) { R>1
int j; 8wJfGY
while ((j = k << 1) <= size) { 2)oT\m
if (j < size %26amp;%26amp; queue[j] j++; oqeA15k$
if (queue[k]>queue[j]) file://不用交换 %!Z9: +;B
break; {x$WBy9
SortUtil.swap(queue,j,k); 3gN#[P
k = j; 1#BMc%
} >;I$&
} \!D<u'n
private void fixUp(int k) { GSck^o2{
while (k > 1) { ^i>Tm9vM
int j = k >> 1; $e>(M&9,
if (queue[j]>queue[k]) d'Cn] <
break; iupuhq$]
SortUtil.swap(queue,j,k); >p"ytRu^
k = j; xx[XwN;
} '*K}$+l
} "tax
i#c1ZC
} 701ei;
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} Ei@w*.3P<
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SortUtil： 3sUTdCnNf
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package org.rut.util.algorithm; T \d-r#{
a B(_ZX'L
import org.rut.util.algorithm.support.BubbleSort; 90ZMO7_
import org.rut.util.algorithm.support.HeapSort; P_Rh& gkuK
import org.rut.util.algorithm.support.ImprovedMergeSort; O2z{>\
import org.rut.util.algorithm.support.ImprovedQuickSort; z^;0{q,
import org.rut.util.algorithm.support.InsertSort; IpX.ube
import org.rut.util.algorithm.support.MergeSort; S3Q^K.e?
import org.rut.util.algorithm.support.QuickSort; `1;m:,9
import org.rut.util.algorithm.support.SelectionSort; !kAjne8]d
import org.rut.util.algorithm.support.ShellSort; E8$k}I
j0^%1
/** &z'NQ!uV
* @author treeroot !$}:4}56F
* @since 2006-2-2 <UI^~Azc#
* @version 1.0 |]s/NNU
*/ 9eG{"0)
public class SortUtil { s.VtmAH
public final static int INSERT = 1; l-?B1gd,l
public final static int BUBBLE = 2; ]mO$Tg&s~
public final static int SELECTION = 3; X9ua&T2(l
public final static int SHELL = 4; `cu W^/c
public final static int QUICK = 5; fjD/<`}v
public final static int IMPROVED_QUICK = 6; ollJ#i9
public final static int MERGE = 7; O{YT6&.S0
public final static int IMPROVED_MERGE = 8; -|Z[GN:
public final static int HEAP = 9; #j!RbW
OFcLh
public static void sort(int[] data) { nd~cpHQR^
sort(data, IMPROVED_QUICK); 6MsVV_/
} 5W%^g_I
private static String[] name={ Yz"B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [WZGu6$SU
}; !'yCB9]O
VTM*=5|c
private static Sort[] impl=new Sort[]{ OAlV7cfD
new InsertSort(), t(d$v_*y51
new BubbleSort(), g7Xjo )
new SelectionSort(), DcjF$E
new ShellSort(), |AgdD
new QuickSort(), j%_{tB
new ImprovedQuickSort(), ?%)G%2
new MergeSort(), ;^fGQ]`4
new ImprovedMergeSort(), j.}@9
new HeapSort() I[P43>F3
}; k 5~#_D>
b-'T>1V
public static String toString(int algorithm){ k&oq6!ix
return name[algorithm-1]; o p{DPUO0
} NoSq:e
|DB7o+4
public static void sort(int[] data, int algorithm) { i!AFXVX
impl[algorithm-1].sort(data); ^v5v7\!
} P|0dZHpT
WR5@S&fU`
public static interface Sort { $9~6M*
public void sort(int[] data); H YA<
} _BC%98:WP
Ln&'5D#
public static void swap(int[] data, int i, int j) { G0e]PMeFl
int temp = data; 06)B<
data = data[j]; q4Rvr[
data[j] = temp; 1$+-?:i C
} CP5vo-/)-
} x-hr64WFK