[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; cWQ &zc
} ;eFV}DWW
int i1=l; B\|^$z2
int i2=mid+1; Z[RifqaBby
for(int cur=l;cur<=r;cur++){ pi;fu
if(i1==mid+1) 4ke.p<dG
data[cur]=temp[i2++]; t ~]' {[F
else if(i2>r) $Y$s*h_-/<
data[cur]=temp[i1++]; nJgN2Z
else if(temp[i1] data[cur]=temp[i1++]; !oRN,m[7)p
else Pr1OQbg]8
data[cur]=temp[i2++]; cjLA7I.O
} M_?B*QZJI
} pxbuZ9w2Q
I8W9Kzf
} #RdcSrw)W!
hOqNZ66{
改进后的归并排序: -e51/lhpd
Q[!?SSX%
package org.rut.util.algorithm.support; 2c,w 4rK
Q^Vch(`&P
import org.rut.util.algorithm.SortUtil; `LwZ(M-hI
%0u5d$bq
/** bLggh]Fh
* @author treeroot 8;UkZN"hy5
* @since 2006-2-2 <X5V]f
* @version 1.0 KI\ 9)
*/ A|mE3q=
public class ImprovedMergeSort implements SortUtil.Sort { q`|E9
:E|+[}|
private static final int THRESHOLD = 10; RLw/~
qIy9{LF
/* Vn^8nS
* (non-Javadoc) O"[#g
* `]&'yt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tsB}'+!v#
*/ A6;[r #C
public void sort(int[] data) { ]3U|K .G
int[] temp=new int[data.length]; :K \IS`
mergeSort(data,temp,0,data.length-1); tQMz1$
} A,#z_2~
p8CaD4bE
private void mergeSort(int[] data, int[] temp, int l, int r) { F9IPA%
int i, j, k; $reQdN=~
int mid = (l + r) / 2; o}D7 $6
if (l == r) MA 6uJT
return; {!4ZRNy(k
if ((mid - l) >= THRESHOLD) t/]za4w/
mergeSort(data, temp, l, mid); Z 2uU'T
else Hw#yw g
insertSort(data, l, mid - l + 1); 3\B~`=*q/
if ((r - mid) > THRESHOLD) 4%>tk 8 [
mergeSort(data, temp, mid + 1, r); !?B2OE
else @nj`T{*.
insertSort(data, mid + 1, r - mid); &4p~i Z
?G5,x
for (i = l; i <= mid; i++) { gFM~M(
temp = data; >ZAn2s
} {mHxlG)
for (j = 1; j <= r - mid; j++) { "W}+~Sn
temp[r - j + 1] = data[j + mid]; h5; +5B}D
} :r_/mzR#
int a = temp[l]; rN~V^k
int b = temp[r]; ~VF?T~Kr_
for (i = l, j = r, k = l; k <= r; k++) { )d5mZE!3
if (a < b) { *u34~v16,
data[k] = temp[i++]; 4Gh%PUV#
a = temp; !NhVPb,
} else { @jr$4pM?
data[k] = temp[j--]; 2$ \#BG
b = temp[j]; (>om.FM
} ZN;fDv
} ;Ac!"_N?7
} zL+M-2hV
yA<\?Ps
/** I]~UOl
* @param data i:^ 8zW
* @param l Eo{js?1G_
* @param i Js,.$t
*/ `b5pa`\4
private void insertSort(int[] data, int start, int len) { a3_pF~Qx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G7HvA46
} .!1E7\
} CakB`q(8
} s.!gsCQme
} VC NQ}h[D
3_Re>i
堆排序： 'p,54<e
`9VRT`e
package org.rut.util.algorithm.support; sGJZG
)9rJ]D^B
import org.rut.util.algorithm.SortUtil; DM !B@
Y#Pg*C8>8
/** W'C~{}c=
* @author treeroot ^<e(3S:
* @since 2006-2-2 ~,84E [VV
* @version 1.0 2MKB(;k
*/ 9C1\?)"D^e
public class HeapSort implements SortUtil.Sort{ l9$"zEC
[Kanj/
/* (non-Javadoc) Y{dj~}mM+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )!D,;,aQ
*/ #Bas+8 @,
public void sort(int[] data) { LZ~}*}jy
MaxHeap h=new MaxHeap(); meyO=>
h.init(data); k Rp$[^ma
for(int i=0;i h.remove(); }$'T=ay&
System.arraycopy(h.queue,1,data,0,data.length); h\OMWJ~
} .u9,w
0qo:M3
private static class MaxHeap{ D +9l$**a
*f+DV[DF
void init(int[] data){ <a%RKjQvT
this.queue=new int[data.length+1]; +@yTcz
for(int i=0;i queue[++size]=data; +zsB~Vz
fixUp(size); k iY1
} glRHn?p
} s ` +cQ
Q2xzux~T
private int size=0; <825?W|
fUS1`
private int[] queue; [`|gj
q!8aYw+c
public int get() { Fpy-?U
return queue[1]; *Ag,/Cm]
} XXPpj< c
um1xSf1Xv
public void remove() { ,CQg6-[
SortUtil.swap(queue,1,size--); -|&&lxrwh
fixDown(1); hxuc4C\J
} MJI`1*(
file://fixdown :0j_I\L
private void fixDown(int k) { rIWQD%Afm
int j; m3 W
while ((j = k << 1) <= size) { 5'[b:YC
if (j < size %26amp;%26amp; queue[j] j++; 05o 1
if (queue[k]>queue[j]) file://不用交换 /gq VXDY+`
break; c$CbC
SortUtil.swap(queue,j,k); &X OFc.u
k = j; {3*Zx"e![
} VPXUy=W
} X< p KAO\
private void fixUp(int k) { Y`!Zk$8
while (k > 1) { 5TS&NefM
int j = k >> 1; W 33MYw
if (queue[j]>queue[k]) #w#:f
break; 4:Id8rzz
SortUtil.swap(queue,j,k); ?=0BU}
k = j; WBY_%RTx
} JWvL
} Hn!13+fS
<GO 5}>}p8
} xg_9#
qO}Q4a+
} 9._owKj
J'Y;j^
SortUtil： &O.lIj#FR
=2.q=a|'
package org.rut.util.algorithm; [,/~*L;7
^s?=$&8f![
import org.rut.util.algorithm.support.BubbleSort; )TzQ8YpO}
import org.rut.util.algorithm.support.HeapSort; 4 oZm0
import org.rut.util.algorithm.support.ImprovedMergeSort; MI\35~JAN
import org.rut.util.algorithm.support.ImprovedQuickSort; 'yR)z$
import org.rut.util.algorithm.support.InsertSort; BDz7$k]
import org.rut.util.algorithm.support.MergeSort; x3Ze\N8w
import org.rut.util.algorithm.support.QuickSort; &-hXk!A
import org.rut.util.algorithm.support.SelectionSort; ^K'@W
import org.rut.util.algorithm.support.ShellSort; yw+LT,AQ.
zM2_z
/** Q?]-/v
* @author treeroot E8]kd
* @since 2006-2-2 k?;B1D8-n
* @version 1.0 j NkobJ1
*/ YzVhNJWpw
public class SortUtil { ![j?/376
public final static int INSERT = 1; IcP\#zhEv
public final static int BUBBLE = 2; nb_$g@03
public final static int SELECTION = 3; VQwF9Iq]`
public final static int SHELL = 4; Z=j6c"
public final static int QUICK = 5; o3=pxU*
public final static int IMPROVED_QUICK = 6; ~"nF$DB
public final static int MERGE = 7; 5V@c~1\
public final static int IMPROVED_MERGE = 8; 'j(F=9)
public final static int HEAP = 9; 'Uu!K!
)4e?-?bK!
public static void sort(int[] data) { AS'%Md&I
sort(data, IMPROVED_QUICK); aGq1YOD[$
} q1?}G5a?
private static String[] name={ :B 9>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p;n"zr8U
}; 2v?fbrC5c
D,P{ ,/
private static Sort[] impl=new Sort[]{ JK'FJ}Z4
new InsertSort(), l~Rd\.O
new BubbleSort(), yr/G1?k%ML
new SelectionSort(), S^T ><C
new ShellSort(), ]-"G:r
new QuickSort(), f O,5 u;
new ImprovedQuickSort(), 7oV$TAAf
new MergeSort(), P+bA>lJd
new ImprovedMergeSort(), !!?TkVyEyM
new HeapSort() ~EtwX YkRZ
}; a|eHo%Qt
VMIX=gTZ
public static String toString(int algorithm){ 7-#
return name[algorithm-1]; #Ic)]0L
} y7~y@2
bYAtUEv
public static void sort(int[] data, int algorithm) { .W s\%S
impl[algorithm-1].sort(data); w;;9YFBdM
} ,=V9?
<NXJ&xs-+
public static interface Sort { {ep(_1
public void sort(int[] data); Oe ~g[I;
} D$Eq~VQ
*WaqNMD[%
public static void swap(int[] data, int i, int j) { a(uZ}yS$
int temp = data; 5yk#(i7C
data = data[j]; zd|n!3;
data[j] = temp; LR#BP}\b'
} %%FzBbWAO
} D9h