[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; \iFE,z
} (ZYOm
int i1=l; <qBPN{'a"
int i2=mid+1; dZ*o H#B
for(int cur=l;cur<=r;cur++){ LBg#KQ@
if(i1==mid+1) aozk,{9-
data[cur]=temp[i2++]; o9/P/PZ\X
else if(i2>r) ?~!h N,h
data[cur]=temp[i1++]; &m`
else if(temp[i1] data[cur]=temp[i1++]; =GF+hM/~
else ep5aBrN]"
data[cur]=temp[i2++]; L>B0%TP^
} GCrN:+E0FJ
} <:?&}'aA
(H$eXW7
} \ys3&<;b
2.6,c$2tB
改进后的归并排序: cMj<k8.{
3]'3{@{}H
package org.rut.util.algorithm.support; #xmUND`@
*jYwcW"R{z
import org.rut.util.algorithm.SortUtil; -&c@c@dC
q9OIw1xQr*
/** [f'7/w+
* @author treeroot =Zj9F1E[i
* @since 2006-2-2 @:Ns`+ W*
* @version 1.0 Th8xh=F[
*/ ;RU)Q)a)
public class ImprovedMergeSort implements SortUtil.Sort { _Qv4;a
)YZ41K5N
private static final int THRESHOLD = 10; _u>+H#
*q^'%'
/* ,"D1!0
* (non-Javadoc) G 5)?!
* _?{2{^v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DT*/2TH*l
*/ * 08LW|:,
public void sort(int[] data) { 3yTBkFI!
int[] temp=new int[data.length]; 7l?=$q>k"
mergeSort(data,temp,0,data.length-1); E(TY%wO
} b`^$2RM&
+/ #J]v-
private void mergeSort(int[] data, int[] temp, int l, int r) { `p!.K9r7
int i, j, k; 4o%hH
int mid = (l + r) / 2; ^#G>P0mG%
if (l == r) (vY10W{
return; L9x,G!
if ((mid - l) >= THRESHOLD) Iv{}U\ u
mergeSort(data, temp, l, mid); a@%FwfIu
else CSs3l
insertSort(data, l, mid - l + 1); 2W}RXqV<
if ((r - mid) > THRESHOLD) }Iu6]?|'
mergeSort(data, temp, mid + 1, r); }RD,JgmV
else 6:e0?R^aD"
insertSort(data, mid + 1, r - mid); NWKD:{
1r;Q5[@
for (i = l; i <= mid; i++) { 46mu,v
temp = data; "dA"N$
} &oT]ycz%
for (j = 1; j <= r - mid; j++) { tvd/Y|bV=
temp[r - j + 1] = data[j + mid]; )&*&ZL0
} Jap v<lV%
int a = temp[l]; 0hPm,H*Y]
int b = temp[r]; .9`.\v6R
for (i = l, j = r, k = l; k <= r; k++) { 0py0zE6,,
if (a < b) { Sna7r~j
data[k] = temp[i++]; 2^|*M@3r
a = temp; j3$KYf`T}
} else { f1Rm9``
data[k] = temp[j--]; >:Rc%ILym
b = temp[j]; ]+J]}C]\d
} ?A]:`l_"
} HSTtDTo
} hGPjH=^EM
Jr#ptf"Wu
/** zg)]:
* @param data $PNR?
* @param l Wt_@ vs@.O
* @param i `TAhW
*/ eQMY3/#
private void insertSort(int[] data, int start, int len) { 6}[W%S]8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zV%U4P)Dao
} _m;Y'
} M*%iMz
} nL\BB&
} [^aow-4z
y%43w4
堆排序： ,;UVQwY
Qp{{OjD
package org.rut.util.algorithm.support; ' R{ [Y)
4SmhtC
import org.rut.util.algorithm.SortUtil; "MlY G6
ptX;-'j(
/** >i=mw5`D]
* @author treeroot |',MgA
* @since 2006-2-2 yY8q{\G
* @version 1.0 ~Q5L)}8N
*/ ao Y"uT+
public class HeapSort implements SortUtil.Sort{ SeKU?\
j:rGFd
/* (non-Javadoc) $ -;,O8yR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5r@x$*>e
*/ "(/.3`g
public void sort(int[] data) { )|3?7?X
MaxHeap h=new MaxHeap(); mL ]zkD_
h.init(data); gaVWfG
for(int i=0;i h.remove(); W,}C*8{+
System.arraycopy(h.queue,1,data,0,data.length); wQDKv'zU1
} 1)H+iN|im/
{i3]3V"Xp
private static class MaxHeap{ |R DPx6!V
W$ M4#
void init(int[] data){ #\Lt0
this.queue=new int[data.length+1]; 2B5Z0<
for(int i=0;i queue[++size]=data; m%l\EE
fixUp(size); ,{7Z OzA
} tyNT1F{
} ~`(#sjr6KR
,SH))%Cyt
private int size=0; Wfz&:J#
e%SQ~n=H 9
private int[] queue; ,{=#
<OCy
public int get() { eVn]/.d
return queue[1]; Bk*AO?3p
} Q"S;r1 D
Az{Z=:(0
public void remove() { l>Z"y\l=
SortUtil.swap(queue,1,size--); *?+E?AGe
fixDown(1); V!(Ty%7
} "}Vow^vb
file://fixdown >d&B:
private void fixDown(int k) { N!{('po
int j; 8:TN,p
while ((j = k << 1) <= size) { D `c YQ-
if (j < size %26amp;%26amp; queue[j] j++; k9xfv@v}
if (queue[k]>queue[j]) file://不用交换 Wyd,7]'z)Z
break; <x *.M"6?
SortUtil.swap(queue,j,k); ??Q'| r
k = j; tY~EB.%
} ~sx?aiO
} 3[amCKel
private void fixUp(int k) { _f8Wa u# "
while (k > 1) { &82Za%
int j = k >> 1; \x5b=~/
if (queue[j]>queue[k]) ^giseWR(
break; '1_CMr
SortUtil.swap(queue,j,k); $OldHe[p
k = j; gDa}8!+i
} =`Pgo5A
} ,C1}gPQ6<
|>Qj]
} 1/:WA:]1,
ozy~`$;c
} &A)AV<=>T
fucG 9B
SortUtil： Q30AaG}f
~7IXJeon
package org.rut.util.algorithm; 5ro^<P0f**
| U)
import org.rut.util.algorithm.support.BubbleSort; 3A!`U6C(
import org.rut.util.algorithm.support.HeapSort; YzNSZJPD
import org.rut.util.algorithm.support.ImprovedMergeSort; ,4M7:=gf
import org.rut.util.algorithm.support.ImprovedQuickSort; Nr8#/H2f
import org.rut.util.algorithm.support.InsertSort; ^}fc]ovV
import org.rut.util.algorithm.support.MergeSort; CB]#`|f
import org.rut.util.algorithm.support.QuickSort; i=jwk_y
import org.rut.util.algorithm.support.SelectionSort; @8{-B;
import org.rut.util.algorithm.support.ShellSort; V(3^ev/
uxLT*,
/** #eadkj#;
* @author treeroot ""q76cx
* @since 2006-2-2 589hfET
* @version 1.0 Dukvi;\
*/ jfF
public class SortUtil { =z#6mSx|W
public final static int INSERT = 1; c_wvuKa
public final static int BUBBLE = 2; blyU53g
public final static int SELECTION = 3; 0P i+ (X
public final static int SHELL = 4; [}:;B$,
public final static int QUICK = 5; pZHx
public final static int IMPROVED_QUICK = 6; >J(._K
public final static int MERGE = 7; ?i'N9 /(
public final static int IMPROVED_MERGE = 8; F#NuZ'U
public final static int HEAP = 9; t$~CLq5ad
NhJ]X cfP8
public static void sort(int[] data) { rMr:\M]t
sort(data, IMPROVED_QUICK); +)$oy]
} rZ`+g7&^Fh
private static String[] name={ ,Y9bXC8+dU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~P!\;S
}; [>--U)/
e7tp4M9!%
private static Sort[] impl=new Sort[]{ ^IW5c>;|
new InsertSort(), r)<c ~\0 7
new BubbleSort(), gOb"-;Zw
new SelectionSort(), M]|tXo$?
new ShellSort(), t^Z-0jH
new QuickSort(), k4T`{s}e
new ImprovedQuickSort(), *'&]DJj
new MergeSort(), oD<aWZ"Z
new ImprovedMergeSort(), "qh~wKJ
new HeapSort() {0L.,T~g+[
}; F-R5Ib-F*A
)O+Vft&#
public static String toString(int algorithm){ _\&vA5-
return name[algorithm-1]; Mbm'cM&}
} !#&`1cYX
xu%_Zt2/?j
public static void sort(int[] data, int algorithm) { ~t+T5`K
impl[algorithm-1].sort(data); pTeN[Yu?
} 2P,%}Ms
2`dKnaF|
public static interface Sort { C*X=nezq
public void sort(int[] data); wF=?EK(;P{
} @tT2o@2Y^
f?JP=j
public static void swap(int[] data, int i, int j) { ?kM2/a"{G
int temp = data; 5nV IC3N+1
data = data[j]; M:M"7>:
data[j] = temp; s@02?+/
} MoZ8A6e?B
} QJ\+u