[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; kST
} R:v`\
int i1=l; 1)M>vdrP
int i2=mid+1; Ye_)~,{,p
for(int cur=l;cur<=r;cur++){ %k3a34P@
if(i1==mid+1) qN_jsJ
data[cur]=temp[i2++]; hU `H\LE
else if(i2>r) %8+'L4
data[cur]=temp[i1++]; +x0-hRD
else if(temp[i1] data[cur]=temp[i1++]; %+9Mr ami
else 2FS,B\d
data[cur]=temp[i2++]; ;wz YZ5=Di
} l$Y7CIH
} %-:6#bz
D|n`9yv a
} CtA0W\9w5a
3u8HF-
改进后的归并排序: _D(F[p|
iffRGnN^e
package org.rut.util.algorithm.support; "ND 7,rQ
t <#Yr%a
import org.rut.util.algorithm.SortUtil; 8<uKzb(O:
xFS`#1
/** dYJW`Q;j.|
* @author treeroot h7 >
* @since 2006-2-2 p9 |r y+t
* @version 1.0 Rj%q)aw'
*/ }o?@
public class ImprovedMergeSort implements SortUtil.Sort { t{K1ht$[:
W6~B~L
private static final int THRESHOLD = 10; [ua{qJ9
]pr;ME<M{
/* P$D1kcCw
* (non-Javadoc) %c(':vI#
* hun/H4f|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l23#"gGb
*/ I"9S
public void sort(int[] data) { !UlG!820
int[] temp=new int[data.length]; O- &>Dc
mergeSort(data,temp,0,data.length-1); O&irgc!
} %Ow,.+m
ek#{!9-
private void mergeSort(int[] data, int[] temp, int l, int r) { [>4Ou^=1
int i, j, k; 1< ;<?
int mid = (l + r) / 2; :NO'[iE
if (l == r) dGcG7*EX
return; }}l04kN_
if ((mid - l) >= THRESHOLD) -pc*$oe
mergeSort(data, temp, l, mid); BxO8oKe
else i%0Ml:Y
insertSort(data, l, mid - l + 1); y#^d8 }+
if ((r - mid) > THRESHOLD) 4S@^ym
mergeSort(data, temp, mid + 1, r); X%S?o
else pNI=HHx
insertSort(data, mid + 1, r - mid); pVPCxP
{cKKTDN
for (i = l; i <= mid; i++) { s&!g )
temp = data; zD-.bHo>.
} O%y.
for (j = 1; j <= r - mid; j++) { $ T.c>13
temp[r - j + 1] = data[j + mid]; V\WqA8
} 6<R!`N 6
int a = temp[l]; ]7-*1kL8=~
int b = temp[r]; ^6|Q$]}Ok
for (i = l, j = r, k = l; k <= r; k++) { =ex71qj)
if (a < b) { NS;,(v{*N
data[k] = temp[i++]; X[}5hZcX
a = temp; /e6\F7
} else { O[;>Y'zqC%
data[k] = temp[j--]; uJm9h(xq
b = temp[j]; a}+|2k_
} vVmoV0kGt
} =zt@*o{F
} )avli@W-3j
InMF$pw
/** +hRAU@RA
* @param data *obBo6!zM
* @param l TP[<u-@G
* @param i !iA0u
*/ (5re'Pl
private void insertSort(int[] data, int start, int len) { &hEtVkK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7g cr$&+e
} JVFn=Mw
} B{lBUv(B
} V,fSn:8%M
} egxh
sME3s-
堆排序： U`D/~KJ{Y
N)03{$WM
package org.rut.util.algorithm.support; $uF}GP_)
>Q#_<IcI
import org.rut.util.algorithm.SortUtil; lzN\~5a}
Mk7,:S
/** 0p:FAvvNI
* @author treeroot %vDN{%h8
* @since 2006-2-2 { ,qm=Xjq
* @version 1.0 n:,At]ky
*/ D|@*HX@_Xp
public class HeapSort implements SortUtil.Sort{ G<l+94(
Jc"xH~,
/* (non-Javadoc) N2vSJ\u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kqYWa`eE
*/ BYFvf(>
public void sort(int[] data) { 0 Ji>drn
MaxHeap h=new MaxHeap(); !v;N@C3C
h.init(data); O{uc h
for(int i=0;i h.remove(); !jGe_xB}~
System.arraycopy(h.queue,1,data,0,data.length); 1WRQjT=o
} 'kf]l=i[n
E4GtJ`{X
private static class MaxHeap{ Cb5;l~}L
{M96jjiInf
void init(int[] data){ /qa{*"2Qo
this.queue=new int[data.length+1]; N?TXPY
for(int i=0;i queue[++size]=data; `h}fS4CO
fixUp(size); {b6| wQ\
} z^j7wMQ
} f]%:.N~1w
ICAp
private int size=0; U:"X *
h|qTMwPr
private int[] queue; R8|H*5T?+
M#%l}
public int get() { OSreS5bg
return queue[1]; -5vg"|ia,
} c\A 4-08
*-uA\
public void remove() { uH*moVw@5
SortUtil.swap(queue,1,size--); $eHYy,,
fixDown(1); }C-K0ba7
} .n$c+{
file://fixdown 4Z8FLA+T,
private void fixDown(int k) { <O:}dXqZ
int j; : EA-L
while ((j = k << 1) <= size) { Zp8\n:
if (j < size %26amp;%26amp; queue[j] j++; o%3i(H
if (queue[k]>queue[j]) file://不用交换 >7g #e,d
break; 'Ur1I"
SortUtil.swap(queue,j,k); [$\KS_,Mn
k = j; #+CH0Z
} sgYPR
} gOiZ8K!
private void fixUp(int k) { ZHu"&&
while (k > 1) { 3yGo{uW
int j = k >> 1; 6%yt"XmT
if (queue[j]>queue[k]) 75v7w
break; DVJuX~'|!
SortUtil.swap(queue,j,k); HSwC4y}
k = j; "w7{,HP
} gXJtk;
} K HyVI6N[
,~Y[XazT
} Cb4.N8
\/XU v(
} %f)%FN.S
B*Z}=$1j
SortUtil： cr,fyAvX
,FIG5-e,}
package org.rut.util.algorithm; %-?k [DL6
u.yYE,9
import org.rut.util.algorithm.support.BubbleSort; _tlr8vL
import org.rut.util.algorithm.support.HeapSort; 6~34L{u
import org.rut.util.algorithm.support.ImprovedMergeSort; d+qeZGg^A
import org.rut.util.algorithm.support.ImprovedQuickSort; Xsk/U++
import org.rut.util.algorithm.support.InsertSort; `.i #3P
import org.rut.util.algorithm.support.MergeSort; (N"9C+S}
import org.rut.util.algorithm.support.QuickSort; 953GmNZ7
import org.rut.util.algorithm.support.SelectionSort; HIGTo\]Z
import org.rut.util.algorithm.support.ShellSort; Y{KN:|i.!
v[~~q
/** U8S<wf&
* @author treeroot t $m:
* @since 2006-2-2 `}:pUf
* @version 1.0 "tT68
*/ cqYMzS t
public class SortUtil { ^O.` P
public final static int INSERT = 1; 4Sz2 9\X
public final static int BUBBLE = 2; 73j\!x
public final static int SELECTION = 3; }!uwWBw`
public final static int SHELL = 4; Gq=tR`.
public final static int QUICK = 5; !L[$t~z
public final static int IMPROVED_QUICK = 6; 8B?*?,n5
public final static int MERGE = 7; cb=ixn
public final static int IMPROVED_MERGE = 8; fJ GwT
public final static int HEAP = 9; /&N\#;kK?b
5X PoQ^
public static void sort(int[] data) { V=gu'~
sort(data, IMPROVED_QUICK); (}RTHpD
} lLur.f
private static String[] name={ f4O}WU}l{s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g-pEt#
}; btOx\y}
;fYJ]5>
private static Sort[] impl=new Sort[]{ :jy}V'bn$
new InsertSort(), BN&eU'Dl]
new BubbleSort(), vs^)=
new SelectionSort(), g#Z7ReMw
new ShellSort(), =qvn?I^/
new QuickSort(), <S^Hy&MD>
new ImprovedQuickSort(), ux8K$$$
new MergeSort(), Zd|u>tn
new ImprovedMergeSort(), E]Qd5l
new HeapSort() WN $KS"b6}
}; V~_6t{L
}#q0K
public static String toString(int algorithm){ DzbcLg%:W
return name[algorithm-1]; `z^50Vh|
} hwQrmVwvP
mGpBj9jr1
public static void sort(int[] data, int algorithm) { s"`Oj5
impl[algorithm-1].sort(data); # uy^AC$
} _Tf %<E
\#v(f2jPF
public static interface Sort { *:%I|5
public void sort(int[] data); Z,-J tl
} UGxF}Q
gj7'43 ?W
public static void swap(int[] data, int i, int j) { VtzBYza
int temp = data; tl 9`
data = data[j]; #nQboTB@
data[j] = temp; } rX)A\ g6
} |['SiO$)
} Spw^h=o