[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; aJdd2,e
} H,u{zU')
int i1=l; ?0*,x)t
int i2=mid+1; qr~P$
for(int cur=l;cur<=r;cur++){ Jz<-B
if(i1==mid+1) 98'/yZ
data[cur]=temp[i2++]; g0O~5.f
else if(i2>r) F>RL&i
data[cur]=temp[i1++]; Q8.=w
else if(temp[i1] data[cur]=temp[i1++]; q!iSY
else LDc?/ Z1
data[cur]=temp[i2++]; ~.7/o0'+
} )31{.c/
} /N'0@q
iI.pxo s
} |qm_ESzl
=HapCmrx8
改进后的归并排序: ZRHK?wg'#
&6wD
package org.rut.util.algorithm.support; =p{55dR
5nF46c
import org.rut.util.algorithm.SortUtil; +Np[m$Z*
MkLXMwuQ&
/** kD;1+lNz
* @author treeroot wIQ~a
* @since 2006-2-2 _@2}zT
* @version 1.0 !>RDHu2n
*/ 71b0MHNkvv
public class ImprovedMergeSort implements SortUtil.Sort { JPO'1D)
.Q!_.LX
private static final int THRESHOLD = 10; EmG':K(
&tVIl$e
/* X} {z7[
* (non-Javadoc) -+ylJo[D
* C-h9_<AwJQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v'RpsCov
*/ ] MP*5U>;
public void sort(int[] data) { .,h>2;f
int[] temp=new int[data.length]; 03pD<
mergeSort(data,temp,0,data.length-1); <fSWX>pR
} aW=c.Q.
u1 Z;n
private void mergeSort(int[] data, int[] temp, int l, int r) { {#`O'F>
int i, j, k; Y8v13"P6
int mid = (l + r) / 2; {=I:K|&
if (l == r) Fc&3tw"g
return; 76::X:76
if ((mid - l) >= THRESHOLD) }_mVXjF
mergeSort(data, temp, l, mid); _+7+90u
else .q90+9Ek=
insertSort(data, l, mid - l + 1); 6C'W
if ((r - mid) > THRESHOLD) ,ArHS
mergeSort(data, temp, mid + 1, r); qPQ6`rD\
else Nwwn #+
insertSort(data, mid + 1, r - mid); )fy-]Ky *
I4XnJ[N%
for (i = l; i <= mid; i++) { baQORU=X
temp = data; kz_gR;"(Z
} z( \4{Y
for (j = 1; j <= r - mid; j++) { M}fk[Yr>
temp[r - j + 1] = data[j + mid]; $-=xG&fSz
} B%7Az!GX
int a = temp[l]; / f5q9sp8
int b = temp[r]; Iip%er%b
for (i = l, j = r, k = l; k <= r; k++) { dl]pdg<
if (a < b) { jFDVd;#CS
data[k] = temp[i++]; |`|#-xu
a = temp; r1axC%
} else { 6,;dU-A+
data[k] = temp[j--]; `.z"Q%uz
b = temp[j]; \OJam<hZ
} .} O@<t
} 8$F"!dc _
} I1pnF61U
,B~5;/|
/** d88Dyzz
* @param data 4aP 96
* @param l $fCKK&Wy
* @param i LD*XNcE
*/ /8#e < p
private void insertSort(int[] data, int start, int len) { ;9CbioO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a,|Hn
} Iq?n*P$
} 3Ofh#|qc&
} bey:Qj??
} %*zV&H
jn4|gQ
堆排序： "4IrW6B$9
W:maE9E=
package org.rut.util.algorithm.support; ^sKdN-{
(_%l[:o6
import org.rut.util.algorithm.SortUtil; s\zY^(v4
3,'LW}
/** =Vm3f^
* @author treeroot `w&?SXFO8
* @since 2006-2-2 S{m:Iij[;
* @version 1.0 Kf-XL),3l
*/ o|$r;<o3R
public class HeapSort implements SortUtil.Sort{ RNF%i~nhO
&S=Qu?H
/* (non-Javadoc) 2`^6``
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gR+P!Eow
*/ Mkh/+f4
public void sort(int[] data) { 4_D *xW
MaxHeap h=new MaxHeap(); )&DsRA7v
h.init(data); w`DcnQK'
for(int i=0;i h.remove(); @HzK)%@
System.arraycopy(h.queue,1,data,0,data.length); j8oX9 Yo0=
} ;Fo7 -kK
Yy~xNj5OS
private static class MaxHeap{ ?W_8X2(`
S{RRlR6Z
void init(int[] data){ ,.kmUd
this.queue=new int[data.length+1]; QOX'ZAB`
for(int i=0;i queue[++size]=data; <5E)6c_W)
fixUp(size); :>}7^1I
} k8\KCKql
} 3@nIoN'z
Q<NQ9lX
private int size=0; ]4ck)zlv
cTW$;Fpc+
private int[] queue; e"UXG\8D
Vm?#~}T
public int get() { 1`1jSx5}.
return queue[1]; {Q>4zepN!
} >k ==7#P
cTz@ga;!mI
public void remove() { Zor!hc0<
SortUtil.swap(queue,1,size--); =),O;M
fixDown(1); P*jiz@6
} ,PoG=W
file://fixdown \K9.]PfbI
private void fixDown(int k) { LGw-cX #
int j; H<}|n1w<
while ((j = k << 1) <= size) { ?H!jKX
if (j < size %26amp;%26amp; queue[j] j++; Nd]RbX
if (queue[k]>queue[j]) file://不用交换 )Z/$;7]#
break; y #C9@C
SortUtil.swap(queue,j,k); H,W8JNPs
k = j; zB`J+r;LU
} pP#D*hiP-g
} OLtXk
private void fixUp(int k) { e_-7,5Co
while (k > 1) { dWi<U4
int j = k >> 1; *o5[P\'6
if (queue[j]>queue[k]) QW'*^^
break; Pl!E$
SortUtil.swap(queue,j,k); 2 FoLJ
k = j; ^62z\Y
} E7i/gY
} l-cBN^^
8bQXC+bK
} [m4M#Lg\0
e$teh` p3
} e|W;(@$<
skXzck
SortUtil： tAo$;|
C:t?HLY)fG
package org.rut.util.algorithm; *|j4>W\J
s FJ:09L|
import org.rut.util.algorithm.support.BubbleSort; *- ~GVe
import org.rut.util.algorithm.support.HeapSort; am!ssF5s
import org.rut.util.algorithm.support.ImprovedMergeSort; 2D:,(
import org.rut.util.algorithm.support.ImprovedQuickSort; H)h^|A/vO
import org.rut.util.algorithm.support.InsertSort; 7x77s
import org.rut.util.algorithm.support.MergeSort; `\|@w@f|;
import org.rut.util.algorithm.support.QuickSort; Nmd{C(^o
import org.rut.util.algorithm.support.SelectionSort; St(jrZb
import org.rut.util.algorithm.support.ShellSort; $&qLrKJ
* ]
/** r\#nBoo(
* @author treeroot ZXL'R|?
* @since 2006-2-2 gG@4MXq.
* @version 1.0 ?w!8;xS8
*/ ~NPhVlT
public class SortUtil { 6`iYIXnz
public final static int INSERT = 1; cHVJ7yAZI
public final static int BUBBLE = 2; `k*;%}X\
public final static int SELECTION = 3; `#w#!@s#@
public final static int SHELL = 4; 2@?X>,
public final static int QUICK = 5; (,t[`z
public final static int IMPROVED_QUICK = 6; tBfmjxv
public final static int MERGE = 7; "g)bNgGV}
public final static int IMPROVED_MERGE = 8; ',!jYh}Uxk
public final static int HEAP = 9; OiXO<1'$
.gGO+8[N*
public static void sort(int[] data) { mn=b&{')e
sort(data, IMPROVED_QUICK); oH&@F@r:+
} eub}+~_?[
private static String[] name={ [mQ1r*[j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" si)>:e
}; \2=I//YF
m&b1H9ymd
private static Sort[] impl=new Sort[]{ h_ccE6]t
new InsertSort(), A`JE(cIz3
new BubbleSort(), 2LR y/ah
new SelectionSort(), fVgN8b|&'
new ShellSort(), I^( pZ9
new QuickSort(), x:4R?!M.
new ImprovedQuickSort(), 7]{t^*
new MergeSort(), nSh~mP
new ImprovedMergeSort(), CbW[_\
new HeapSort() [&4+ <Nl'
}; '_V9FWDZ
lyFlJmi,r
public static String toString(int algorithm){ ~OsLbz:
return name[algorithm-1]; N$#~&
} iPV-w_HQ
}y+Qj6dP
public static void sort(int[] data, int algorithm) { h,B4Tg'
impl[algorithm-1].sort(data); 1ig*Xp[
} oJ*,a
`L 1+j
public static interface Sort { N8df1>mW
public void sort(int[] data); aNY-F)XWa
} ykJ+LS{+
JNXzZ4U
public static void swap(int[] data, int i, int j) { KM)f~^
int temp = data; NOwd'iU
data = data[j]; D!OY<?
data[j] = temp; 0HU0p!yt&
} Z3YKG{g
} kr~n5WiAZ