[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; n\D&!y[]F
} ~&{S<Wl
int i1=l; "| g>'wM*
int i2=mid+1; (gU!=F?#m
for(int cur=l;cur<=r;cur++){ S Lj!v&'
if(i1==mid+1) iByf{I>+
data[cur]=temp[i2++]; pRpBhm;iJ
else if(i2>r) djG*YM\B
data[cur]=temp[i1++]; KC6.Fr{
else if(temp[i1] data[cur]=temp[i1++]; }?i0 I
else `25yE/
data[cur]=temp[i2++]; M h}m;NI
} }C?'BRX
} 2\{M:\2o
7U"g3a)=
} itP,\k7>d
=BAr .m+"
改进后的归并排序: _8J.fT$${
p38-l'{#
package org.rut.util.algorithm.support; !;{7-~
HM1Fz\Sf
import org.rut.util.algorithm.SortUtil; q`7PhA
:\c ^*K(9
/** ie95rZp
* @author treeroot iHf$
* @since 2006-2-2 &h)yro
* @version 1.0 SHgN~Um
*/ 4l'fCZhA}
public class ImprovedMergeSort implements SortUtil.Sort { ZvX*t)VjTz
]Q1yNtN
private static final int THRESHOLD = 10; _6hQ %hv8
F~W6Bp^W
/* ueWEc^_>
* (non-Javadoc) 3(N$nsi
* NwvC[4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B dfwa
*/ xm~`7~nFR
public void sort(int[] data) { _D&598xx
int[] temp=new int[data.length]; |SSSH
mergeSort(data,temp,0,data.length-1); /C:gKy4
} s!zx} 5
'<)n8{3Q5w
private void mergeSort(int[] data, int[] temp, int l, int r) { eC4[AX6e
int i, j, k; 8kIksy
int mid = (l + r) / 2; 2@],ZLa
if (l == r) rZ$O?K
return; Of#u
if ((mid - l) >= THRESHOLD) +TL%-On
mergeSort(data, temp, l, mid); pah'>dAL
else K@]4g49A/j
insertSort(data, l, mid - l + 1); T&bYa`f]
if ((r - mid) > THRESHOLD) Dml;#'IF3
mergeSort(data, temp, mid + 1, r); #:_Kws>+
else G~a ZJ,
insertSort(data, mid + 1, r - mid); Dx?,=~W9
JXQO~zj
for (i = l; i <= mid; i++) { RbnVL$c
temp = data; i&fuSk EP
} &6!)jIWJ
for (j = 1; j <= r - mid; j++) { 8dA~\a
temp[r - j + 1] = data[j + mid]; #zs~," dRv
} T?0eVvM
int a = temp[l]; O0v}43J[
int b = temp[r]; Z5n1@a__
for (i = l, j = r, k = l; k <= r; k++) { qe#tj/aZ
if (a < b) { 2]*OQb#O6e
data[k] = temp[i++]; M|h3Wt~7
a = temp; !f[_+CD
} else { @,+5y\]C
data[k] = temp[j--]; PC8Q"O
b = temp[j]; <kqo^
} >+1duAC
} cV6D<,)
} ED gag
.`eN8Dl1
/** h[Y1?ln&h
* @param data K\r8g=U
* @param l + &Eqk
* @param i YD6'#(
*/ (w3YvG.
private void insertSort(int[] data, int start, int len) { 2/^3WY1U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ES7s1O$#
} ouQ T
} M6jy\<a
} ~36!?&eA8
} d7upz]K9g
q|(HsLs
堆排序： tyFzSrfc
;6$jf:2m
package org.rut.util.algorithm.support; KZE,bi:~
rb.N~
import org.rut.util.algorithm.SortUtil; n_A3#d<9
6bC3O4Rw
/** _`T_">9r
* @author treeroot ?fSG'\h>
* @since 2006-2-2 S,UDezxg
* @version 1.0 b4kgFA
*/ a1lh-2xX
public class HeapSort implements SortUtil.Sort{ kDxFloK
u6JM]kR
/* (non-Javadoc) rEWb"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Svmy(w~m
*/ Y$_B1_
public void sort(int[] data) { wc4=VC"y
MaxHeap h=new MaxHeap(); ~f98#43
h.init(data); aW7^d'ZZ\
for(int i=0;i h.remove(); 8l`*]1.W<
System.arraycopy(h.queue,1,data,0,data.length); f]CXu3w(J
} h:|qC`}
wmLs/:~
private static class MaxHeap{ YS0<qSN
} q8ASYNc
void init(int[] data){ 4tBYR9|
this.queue=new int[data.length+1]; =7eV/3
for(int i=0;i queue[++size]=data; 8d'0N
fixUp(size); (jE9XxQY
} 6i/(5 nQ
} 26h21Z16q
b]KBgZ
private int size=0; R\[e!g*I
sPIn|d
private int[] queue; ;i+jJ4
b>ySv
public int get() { z2GY:<s
return queue[1]; =Xr.'(U
} 1yhDrpm
Dlvz)
public void remove() { s$j,9uRr
SortUtil.swap(queue,1,size--); k<?b(&`J
fixDown(1); dy[X3jQB
} (sZ"iGn%
file://fixdown 6'f;-2
private void fixDown(int k) { ckCE1e>s
int j; mC#>33{
while ((j = k << 1) <= size) { 0g8NHkM:2a
if (j < size %26amp;%26amp; queue[j] j++; y:uE3Apm
if (queue[k]>queue[j]) file://不用交换 gB33?
break; ;$g?T~v7
SortUtil.swap(queue,j,k); V'gh6`v
k = j; 5{,<j\#L
} r~['VhI!;E
} sW\!hW1*x
private void fixUp(int k) { S_H+WfIHV'
while (k > 1) { RViAwTvY
int j = k >> 1; 8}:nGK|kx
if (queue[j]>queue[k]) h<QY5=SF
break; V0mn4sfs
SortUtil.swap(queue,j,k); Ny/MJ#Lq
k = j; *vMn$,^0h9
} )^hbsMhO
} #RLt^$!H
4*;MJ[|
} %?/X=}sE
dWBA1p
} JucY[`|JV
y@yD5$/
SortUtil： 8&dF
\9EjClfo
package org.rut.util.algorithm; E]r?{t`]
w0unS`\4
import org.rut.util.algorithm.support.BubbleSort; |R:'\+E
import org.rut.util.algorithm.support.HeapSort; wMN]~|z>
import org.rut.util.algorithm.support.ImprovedMergeSort; |_U= z;Y
import org.rut.util.algorithm.support.ImprovedQuickSort; >9J:Uo1z
import org.rut.util.algorithm.support.InsertSort; Tlr v={
import org.rut.util.algorithm.support.MergeSort; Xch~ 1K
import org.rut.util.algorithm.support.QuickSort; .=; ;
import org.rut.util.algorithm.support.SelectionSort; )V9bI(v
import org.rut.util.algorithm.support.ShellSort; uyx 2;f
u ^RxD^=L
/** BY*8ri^u
* @author treeroot #g!.T g'
* @since 2006-2-2 alb.g>LNPP
* @version 1.0 TA~{1_l
*/ `Q,H|hp;k;
public class SortUtil { X}0cCdW
public final static int INSERT = 1; k9F=8q
public final static int BUBBLE = 2; wy2 D;;
public final static int SELECTION = 3; Eh4=ZEX
public final static int SHELL = 4; ?aMOZn?
public final static int QUICK = 5; 69.NPy@
public final static int IMPROVED_QUICK = 6; TD_Oo-+\
public final static int MERGE = 7; *Pg2c(Vg
public final static int IMPROVED_MERGE = 8; ySI!d|_
public final static int HEAP = 9; g9F?z2^
bg0Wnl
public static void sort(int[] data) { \l3h0R
sort(data, IMPROVED_QUICK); ybUaTD@?}b
} 4B][S'f
private static String[] name={ P!k{u^$L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5@W j>:w
}; kG*~|ma
NGWxN8P6
private static Sort[] impl=new Sort[]{ / XIhj
new InsertSort(), +ck}l2&#
new BubbleSort(), .N(p=9
new SelectionSort(), bZV/l4TU
new ShellSort(), jz0T_\8D`
new QuickSort(), 3;Fhg!ZO
new ImprovedQuickSort(), vvOV2n.WD
new MergeSort(), 9nbLg5P
new ImprovedMergeSort(), TS5Q1+hWHV
new HeapSort() 3R VR
}; cM7[_*Ot<m
rrv%~giU
public static String toString(int algorithm){ [0e_*
return name[algorithm-1]; rVsJ`+L
} Af{"pzY
Rx}Gz$
public static void sort(int[] data, int algorithm) { vr^qWn
impl[algorithm-1].sort(data); ,Y48[_ymm
} Du){rVY^d
sx<%2
public static interface Sort { %~S&AE-
public void sort(int[] data); DlNX 3
} |^H5^k "Bv
;*&-C9b
public static void swap(int[] data, int i, int j) { Yz<1 wt7;
int temp = data; @s^-.z
data = data[j]; RpYERAgT
data[j] = temp; 7VI*N)OZ8
} @\I#^X5lv
} Rws3V"{`[