[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; K5h
} *?vCC+c
int i1=l; <n$'voR7]
int i2=mid+1; (%6P0*
for(int cur=l;cur<=r;cur++){ Nai2W<,
if(i1==mid+1) Sz`,X0a
data[cur]=temp[i2++]; t3_O H^
else if(i2>r) 0#hlsfc]\
data[cur]=temp[i1++]; 1CZgb
else if(temp[i1] data[cur]=temp[i1++]; T7%S #0,p
else 6d}lw6L
data[cur]=temp[i2++]; /{_:{G!Q0
} 9TC,!0U{_.
} q3!bky\
.`eN8Dl1
} Dz/ "M=
T!#GW/?
改进后的归并排序: + &Eqk
iYoMO["X
package org.rut.util.algorithm.support; 7JH6A'&
LEdh!</'24
import org.rut.util.algorithm.SortUtil; ~<bZ1TD
\M^bD4';>
/** rM%1GPVob
* @author treeroot 4+8@`f>s
* @since 2006-2-2 g3y~bf
* @version 1.0 {;1\+f
*/ H7n>Vx:L-
public class ImprovedMergeSort implements SortUtil.Sort { Q)h(nbbVak
C1)!f j=
private static final int THRESHOLD = 10; J ZS:MFA
r#a=@
/* oG\Vxg*
* (non-Javadoc) 2[W&s&
* a;+9mDXx:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d#FQc18v}k
*/ oMa6(3T?E
public void sort(int[] data) { XRi8Gpg
int[] temp=new int[data.length]; m:2^=l4
mergeSort(data,temp,0,data.length-1); NXrlk
} *GPiOA a
T0)@pt7>
private void mergeSort(int[] data, int[] temp, int l, int r) { DTL.Bsc-.
int i, j, k; ~f98#43
int mid = (l + r) / 2; kl:Bfs)b
if (l == r) /U9"wvg
return; f]CXu3w(J
if ((mid - l) >= THRESHOLD) VTE .^EK!
mergeSort(data, temp, l, mid); ;e*!S}C,
else 7!E,V:bt'
insertSort(data, l, mid - l + 1); sO@Tf\d
if ((r - mid) > THRESHOLD) zrb}_
mergeSort(data, temp, mid + 1, r); B]tQ(s~
else O\r0bUPE
insertSort(data, mid + 1, r - mid); {P_.~0pc*
6i/(5 nQ
for (i = l; i <= mid; i++) { .ioEIsg
temp = data; hwv/AnX~O
} \4fQMG
for (j = 1; j <= r - mid; j++) { c^W)07-X5y
temp[r - j + 1] = data[j + mid]; a:w#s}bL
} &^jXEz;
int a = temp[l]; ` Sz}`+E
int b = temp[r]; G 3ptx! D
for (i = l, j = r, k = l; k <= r; k++) { NgPk&niM
if (a < b) { <LiPEo.R
data[k] = temp[i++]; +M/%+l
a = temp; f@!.mDm]
} else { i/Zd8+.n$
data[k] = temp[j--]; -iZ`Y?
b = temp[j]; 3Y$GsN4ln
} j3Y['xDv
} [4)F f
} =I_'.b
cr;da)
/** tCt#%7J;a
* @param data eaU
* @param l p`qgrI`
* @param i ?:0Jav
*/ Mo|2}nf
private void insertSort(int[] data, int start, int len) { (E1~H0^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |FRg\#kf%
} $XH^~i;
} FS.L\MjV]U
} 5b7RYV
} ]`WJOx4
1'8YkhQ2a
堆排序： Nh+H9
qHsA1<wg
package org.rut.util.algorithm.support; N;%6:I./
F#E3q|Q"BS
import org.rut.util.algorithm.SortUtil; @=u3ZVD
JucY[`|JV
/** jL}v9$
* @author treeroot OY({.uVdX
* @since 2006-2-2 FS1z`wYP
* @version 1.0 E]r?{t`]
*/ owv[M6lbD
public class HeapSort implements SortUtil.Sort{ H\[W/"
wMN]~|z>
/* (non-Javadoc) e*1_8I#2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R4d=S4i
*/ a 1*p*dM#
public void sort(int[] data) { S+lqA-:
MaxHeap h=new MaxHeap(); "0TZTa1e
h.init(data); Iq.*8Oc
for(int i=0;i h.remove(); tZo} ;|~'
System.arraycopy(h.queue,1,data,0,data.length); '|=;^Z7.K
} zm;C\s rF
GC'O[q+
private static class MaxHeap{ 2X&qE}%k S
[2cD:JL
void init(int[] data){ FpU>^'2]
this.queue=new int[data.length+1]; d#wVLmKZ
for(int i=0;i queue[++size]=data; q@2siI~W
fixUp(size); pfI&E#:5
} I%Z
} Dvln/SBk
e+K^Aq
private int size=0; BJ(M2|VH
08{@rOr
private int[] queue; Etm?'
w4Z'K&d=
public int get() { f%hEnZv
return queue[1]; poFg1
} i@J;G`
9gZ$
public void remove() { P!k{u^$L
SortUtil.swap(queue,1,size--); |ENh)M8}r
fixDown(1); Xn ;AZu^'R
} >(RkZ}z
file://fixdown jc9y<{~x/
private void fixDown(int k) { 6W UrQFK
int j; xkAK!uVy
while ((j = k << 1) <= size) { bZV/l4TU
if (j < size %26amp;%26amp; queue[j] j++; #.[k=dj
if (queue[k]>queue[j]) file://不用交换 3;Fhg!ZO
break; :BTq!>s
SortUtil.swap(queue,j,k); syK^<xa
k = j; TS5Q1+hWHV
} @lph)A Nk
} k VQ\1!
private void fixUp(int k) { rrv%~giU
while (k > 1) { <9 ;!3xG
int j = k >> 1; ?z u8)U
if (queue[j]>queue[k]) ig &Y
break; E4xa[iZ
SortUtil.swap(queue,j,k); !f6(Zho
k = j; PUX;I0Cf
} Y nZiTe@
} BsJC0I(
4X|zmr:A
} xN%K^Tree
T]p-0?=4vv
} uW3!Yg@
pD+k*
SortUtil： OZ!^ak
L8 @1THY
package org.rut.util.algorithm; 3f;>" P}
S21,VpW\
import org.rut.util.algorithm.support.BubbleSort; ^Zp>G{QL{
import org.rut.util.algorithm.support.HeapSort; dcT80sOC
import org.rut.util.algorithm.support.ImprovedMergeSort; j <RrLn_
import org.rut.util.algorithm.support.ImprovedQuickSort; _<2E"PrT
import org.rut.util.algorithm.support.InsertSort; 0qT%!ku&
import org.rut.util.algorithm.support.MergeSort; ?G&ikxl
import org.rut.util.algorithm.support.QuickSort; c[Zje7 @
import org.rut.util.algorithm.support.SelectionSort; Z EO WO
import org.rut.util.algorithm.support.ShellSort; ^G-@06/!
dC4'{n|7
/** 4xJQ!>6
* @author treeroot &iVs0R
* @since 2006-2-2 \D&KC,i5f
* @version 1.0 /H+a0`/
*/ 7v_8_K
public class SortUtil { BFW&2
public final static int INSERT = 1; GvlS%
public final static int BUBBLE = 2; OK gqT!
public final static int SELECTION = 3; jlg(drTo
public final static int SHELL = 4; dAe')N:KPI
public final static int QUICK = 5; H 7 ^/q7
public final static int IMPROVED_QUICK = 6; h`.&f
public final static int MERGE = 7; y18Y:)DkL
public final static int IMPROVED_MERGE = 8; &G$Ucc `
public final static int HEAP = 9; KCDE{za
P L+sR3bR
public static void sort(int[] data) { 1g~R/*Jo
sort(data, IMPROVED_QUICK); j1HW._G
} ^y4Z+Gu[
private static String[] name={ /|&*QLy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kz7(Z'pw
}; gKCX|cULY
FNId;
private static Sort[] impl=new Sort[]{ K'I#W lg
new InsertSort(), pFz`}?c0
new BubbleSort(), !$>R j
new SelectionSort(), j$5LN.8J
new ShellSort(), eKqk= (
new QuickSort(), EAby?51+
new ImprovedQuickSort(), F1Bq$*'N$w
new MergeSort(), _t}WsEQ+P
new ImprovedMergeSort(), 5+ MS^H
new HeapSort() $ o#V#
}; 8SS|a
h3@v+Z<}
public static String toString(int algorithm){ t<?,F
return name[algorithm-1]; Y:)e(c"A
} -RK- Fu<e
uhutg,[
public static void sort(int[] data, int algorithm) { m<2M4u
impl[algorithm-1].sort(data); XHGFf_kW_N
} LB?u8>a' I
%GIr&V4|
public static interface Sort { `x%>8/
public void sort(int[] data); "Os_vlapHo
} ps DetP
Xm2z}X(%
public static void swap(int[] data, int i, int j) { S?BG_J6A7
int temp = data; 4|#WFLo@
data = data[j]; >~+ELVB&
data[j] = temp; {P#|zp4C{
} &Z|P2dI
} VTHH&$ZNq