[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; h4/X 0@l`
} P"1 S$oc
int i1=l; TI=h_%mO
int i2=mid+1; [*)Z!)
for(int cur=l;cur<=r;cur++){ )t:7_M3
if(i1==mid+1) I^D0<lHl~
data[cur]=temp[i2++]; Bn?:w\%Ue
else if(i2>r) JWROYED
data[cur]=temp[i1++]; 9GgA6#
else if(temp[i1] data[cur]=temp[i1++]; [$\z'}
else lv]quloT
data[cur]=temp[i2++]; T$KF< =
} MxOD8TDF4
} ,`32!i
eWvo,4
} XX6 T$pA6
'7*=`q{
改进后的归并排序: Z)pz,
I;7nb4]AmF
package org.rut.util.algorithm.support; cX:HD+wO
.R5y:O
import org.rut.util.algorithm.SortUtil; u3J?bR
dRI^@n
/** 5l DFp9
* @author treeroot ,Q/Ac{C
* @since 2006-2-2 S[,8TErz
* @version 1.0 Lq (ZcEKo
*/ *1{S*`|cJy
public class ImprovedMergeSort implements SortUtil.Sort { QvLZg
@]HXP_lyD/
private static final int THRESHOLD = 10; ?":'O#E
F7MzCZvu
/* ^V3v{>D>
* (non-Javadoc) 06*rWu9P3
* }LP!)|E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s%pfkoOY%
*/ a%BeqSZh
public void sort(int[] data) { 1tMQqI`N
int[] temp=new int[data.length]; ' GG=Ebt
mergeSort(data,temp,0,data.length-1); 6rN(_Oi-
} pS[KBQ"F
2;`=P5V
private void mergeSort(int[] data, int[] temp, int l, int r) { {@Y
int i, j, k; 7^*"O&y_al
int mid = (l + r) / 2; {HOy_Fiih
if (l == r) 8|Y.|\
return; =gh`JN6
if ((mid - l) >= THRESHOLD) J#2!ZQE 3
mergeSort(data, temp, l, mid); w}R~C
else r\`+R"
insertSort(data, l, mid - l + 1); QK`i%TXJ
if ((r - mid) > THRESHOLD) =PHIpFIuk
mergeSort(data, temp, mid + 1, r); h*B|fy4K9U
else zTbVp8\pI
insertSort(data, mid + 1, r - mid); w$Ot{i|$(
fV:4#j
for (i = l; i <= mid; i++) { qT:zEt5
temp = data; 4Kwh?8.
} qmy%J
for (j = 1; j <= r - mid; j++) { ,m<H-gwa
temp[r - j + 1] = data[j + mid]; 3]&o*Ib1`_
} )~6zYJ2
int a = temp[l]; NS)}6OI3~"
int b = temp[r]; &sXRN&Fp
for (i = l, j = r, k = l; k <= r; k++) { dsx]/49<
if (a < b) { <"D=6jqZ
data[k] = temp[i++]; Sn4[3JV$l
a = temp; hwN?/5
} else { Wo~vhv$E
data[k] = temp[j--]; G`fC/Le
b = temp[j]; PQKaqv}N
} (+<1*5BEkT
} qn1255fB
} S [h];eM
%1 vsN-O}8
/** obrl#(\P
* @param data ^.k |SK`U
* @param l :0)3K7Q
* @param i 5]I|DHmu
*/ $D v\ e
private void insertSort(int[] data, int start, int len) { [.hyZ}B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +YLejjQ
} G0u LmW70
} 'Jf^`ZT}
} ;$Y4xM`=m
} I1oje0$
m-^8W[r+_
堆排序： Uj+j}C
ac kqH+'
package org.rut.util.algorithm.support; P0H6mn*
cLPkK3O\=
import org.rut.util.algorithm.SortUtil; mWR4|1(
M?b6'd9f
/** LK6; ?m
* @author treeroot 7\*FEjRM]
* @since 2006-2-2 )X9W y!w0
* @version 1.0 %sHF-n5P
*/ .q&'&~!_
public class HeapSort implements SortUtil.Sort{ JpsPNa
N]KxAttt
/* (non-Javadoc) V[-jD8='3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !T](Udf
*/ pV4Whq$
public void sort(int[] data) { h/B>S
MaxHeap h=new MaxHeap(); w =.Fj
h.init(data); A,r*%&4~
for(int i=0;i h.remove(); Y"-^%@|p
System.arraycopy(h.queue,1,data,0,data.length); CPg+f1K
} 8NaqZ+5x
s w39\urf
private static class MaxHeap{ `tjH<
"\0v,!@
void init(int[] data){ 6s0_#wZC
this.queue=new int[data.length+1]; G$ _yy:
for(int i=0;i queue[++size]=data; It2" x;
fixUp(size); @?YRuwp L
} /-#I_>:8'
} &\apwD
kcb.Wz~=
private int size=0; dt2$`X18
ooUk O
private int[] queue; QWMdn
2tal
public int get() { ox+ 3U
return queue[1]; hWH:wB
} 4)1s M=u
[oF|s-"9!
public void remove() { TEDAb>
SortUtil.swap(queue,1,size--); Ok n(pJ0
fixDown(1); e["2QIOe
} %/9 EORdeH
file://fixdown nu'M 39{
private void fixDown(int k) { 'uq#ai[5I
int j; 1KjU ] r2
while ((j = k << 1) <= size) { bQ~j=\[r
if (j < size %26amp;%26amp; queue[j] j++; ]O]GeAGC2
if (queue[k]>queue[j]) file://不用交换 2(/g}
break; T0&f8
SortUtil.swap(queue,j,k); ,\qs4&
k = j; ;A#`]-i C
} 6ND`l5
} byv[yGa`
private void fixUp(int k) { 8P=o4lO+
while (k > 1) { /%Nr?V
int j = k >> 1; }g4 M2|
if (queue[j]>queue[k]) gdkwWoN.
break; }[M`uZ
SortUtil.swap(queue,j,k); {#)0EzV6
k = j; g55`A`5%C
} NMA}Q$o s
} =|9H
1AU#%wIEP
} +"1NC\<*
H/Llj.-jg
} r3>i+i42
j\m_o% 4
SortUtil： J9=m]R8T
9~l hsH
package org.rut.util.algorithm; @'|)~,"bx
Ox@sI:CT
import org.rut.util.algorithm.support.BubbleSort; ~V$|i"
import org.rut.util.algorithm.support.HeapSort; vBog0KD);s
import org.rut.util.algorithm.support.ImprovedMergeSort; {RF-sqce
import org.rut.util.algorithm.support.ImprovedQuickSort; DG?"5:Zd
import org.rut.util.algorithm.support.InsertSort; )HvnoUO0
import org.rut.util.algorithm.support.MergeSort; VqS#waNrx
import org.rut.util.algorithm.support.QuickSort; ,u/aT5\_
import org.rut.util.algorithm.support.SelectionSort; 4n4?4BEn
import org.rut.util.algorithm.support.ShellSort; Y*!qG
qM.bF&&Go
/** #y%!\1M/:A
* @author treeroot /IsS;0K%L
* @since 2006-2-2 /RMPS. d {
* @version 1.0 E<c9#I=
*/ K3=3~uY
public class SortUtil { Jej` ;I
public final static int INSERT = 1; F}=aBV|-
public final static int BUBBLE = 2; #b~JDO(
public final static int SELECTION = 3; 4 M(-xl?
public final static int SHELL = 4; 0)m(;>'70
public final static int QUICK = 5; Yboiwy,n
public final static int IMPROVED_QUICK = 6; X@f "-\
public final static int MERGE = 7; PnoPbk[<
public final static int IMPROVED_MERGE = 8; nH<eR)0
public final static int HEAP = 9; 8)4P Ll
3Oi nK['
public static void sort(int[] data) { rf$X>M=G
sort(data, IMPROVED_QUICK); u&n' ITH
} 4!LCR}K
private static String[] name={ l'3pQ;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xQ@^$_
}; nI*v820,
|Z*J/v'@p
private static Sort[] impl=new Sort[]{ IhA*"
new InsertSort(), +9")KQT
new BubbleSort(), /IM#.v
new SelectionSort(), Et/&^&=\-
new ShellSort(), 3l#IPRn9AO
new QuickSort(), TEaJG9RU>v
new ImprovedQuickSort(), xa pq*oj
new MergeSort(), >mjNmh7
new ImprovedMergeSort(), UNkCL4N
new HeapSort() zNIsf"
}; ]~E0gsq
k0Uyf~p~
public static String toString(int algorithm){ aG92ay
return name[algorithm-1]; >`%'4<I
} $]A/ o(
3fh8$A
public static void sort(int[] data, int algorithm) { F 3'9u#
impl[algorithm-1].sort(data); fOMvj%T@2
} E,f>1meN=
!ki.t
public static interface Sort { 1rDqa(7
public void sort(int[] data); 7%{ |
} (bh95X
.k0~Vh2u
public static void swap(int[] data, int i, int j) { LK@lpkX
int temp = data; Ed ,D8ND
data = data[j]; :G<E^<M\)^
data[j] = temp; PK4iuU`vh
} 6l4mS~/
} ^tCd L@$AS