[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; o7.e'1@
} $*k)|4
int i1=l; D}-o+6TI?
int i2=mid+1; u#1%P5r&X
for(int cur=l;cur<=r;cur++){ ]Kv q |}=
if(i1==mid+1) q(78fZ *X
data[cur]=temp[i2++]; 3QW_k5o
else if(i2>r) ^K+:C;Q|
data[cur]=temp[i1++]; Jm4#V~w
else if(temp[i1] data[cur]=temp[i1++]; w!\3ICB
else TXjloGv^
data[cur]=temp[i2++]; 'TL2%T/)t
} 9e!vA6Fx
} -IadHX}]t
n@hl2M6.x9
} >L gVj$Z
xRlYr# %
改进后的归并排序: B@ {&<
,of]J|
package org.rut.util.algorithm.support; P^pFqUL7#
w]nX?S8
import org.rut.util.algorithm.SortUtil; Z&Ue|Z4Qt
+c--&tBo
/** iwU[6A
* @author treeroot =Q-k'=6\
* @since 2006-2-2 );Z]SGd
* @version 1.0 Ry?4h\UX5
*/ e # 5BPI
public class ImprovedMergeSort implements SortUtil.Sort { LEZ&W;bCo
;$7v%Ls=
private static final int THRESHOLD = 10; PnA?+u2m
8u>gbdU
/* \:Za[6
* (non-Javadoc) ; DDe.f"
* Q8q@Y R#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zsj`F9*e
*/ e`iEy=W
public void sort(int[] data) { :lgi>^
int[] temp=new int[data.length]; Ow@v"L;jF!
mergeSort(data,temp,0,data.length-1); EiWd+v,QJQ
} $ KB
*nRNg.i3D
private void mergeSort(int[] data, int[] temp, int l, int r) { s5&=Bsv
int i, j, k; (Sv>NQp
int mid = (l + r) / 2; v*z(@<Y
if (l == r) {:bN/zV#
return; 0}]SUe^
if ((mid - l) >= THRESHOLD) uFG<UF
mergeSort(data, temp, l, mid); gzf-)J
else e"k/d<
insertSort(data, l, mid - l + 1); OX\$nQ\o
if ((r - mid) > THRESHOLD) W\8Ln>
mergeSort(data, temp, mid + 1, r); Z(e^iH
else b*EXIzQ
insertSort(data, mid + 1, r - mid); r8[T&z@_
-:<lkq&/
for (i = l; i <= mid; i++) { [|RjHGf
temp = data; /:Lu_)5
} E7nFb:zlV
for (j = 1; j <= r - mid; j++) { _w!a`w*3
temp[r - j + 1] = data[j + mid]; ;hHi@Z9
} 20tO#{Li
int a = temp[l]; aC!EWgwW[
int b = temp[r]; gmP9j)V6
for (i = l, j = r, k = l; k <= r; k++) { 19t{|w<
if (a < b) { z)-c#F@%
data[k] = temp[i++]; P`(Mk6gE
a = temp; DMn4ll|
} else { $4m*kQ
data[k] = temp[j--]; $SY]fNJQ
b = temp[j]; I4t*?
} D#Kuo$
} ^zr^ N?a
} `VT>M@i/
|^a;77nE_^
/** _mJG5(|
* @param data G$bJ+
* @param l !yJICjXj
* @param i wRvb8F0
*/ 3@<zg1.9-
private void insertSort(int[] data, int start, int len) { 0N;%2=2_E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DHw<%Z-J
} W0I4Vvh_"
} 8)j@aiF`
} eE(b4RCM
} 7TX2&kMoc
xZ.!d.rn
堆排序： np9dM
MYdO jcN
package org.rut.util.algorithm.support; `<frgXu64
[f/I2
import org.rut.util.algorithm.SortUtil; -c*\o3)
swcd&~9r
/** 8sOQ9
* @author treeroot O;uG?.\
* @since 2006-2-2 ,$lemH1d
* @version 1.0 i=S~(gp
*/ vB0RKk}d5
public class HeapSort implements SortUtil.Sort{ L]%l51U
kmPYx)o
/* (non-Javadoc) 646JDX[o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g)"gw+ZFc
*/ sG7u}r
public void sort(int[] data) { mtAE
MaxHeap h=new MaxHeap(); ?C-Towo=i
h.init(data); 78 f$6J q
for(int i=0;i h.remove(); kz}R[7
System.arraycopy(h.queue,1,data,0,data.length); GVGlVAo|@
} V3Z]DA
g}LAks
private static class MaxHeap{ 0#_'o ,
i3$$,W!
void init(int[] data){ d+eZub94U
this.queue=new int[data.length+1]; }UwO<#
for(int i=0;i queue[++size]=data; tc+WWDP#"
fixUp(size); I\O\,yPhhP
} 3uWkc3
} }<a^</s
SmwQET<H
private int size=0; h^UKT`9vt
#W>QY Tp
private int[] queue; <AH1i@4
+Vb8f["+-
public int get() { V!_71x\-Q
return queue[1]; KqY["5p
} uVE.,)xz
q*7<)VwI
public void remove() { PNs~[
SortUtil.swap(queue,1,size--); =FP0\cQ.
fixDown(1); 4GdX/6C.
} 58Xzup_"
file://fixdown Yr.sm!xA
private void fixDown(int k) { ^TY;Zp
int j; "Jq8?FoT
while ((j = k << 1) <= size) { (V`Md\NL`
if (j < size %26amp;%26amp; queue[j] j++; i%m"@7.kk
if (queue[k]>queue[j]) file://不用交换 Mj#-j/{x{5
break; &#`l;n:]+
SortUtil.swap(queue,j,k); 1\*\?\T>_
k = j; /D&%v*~E
} {76c%<`WaP
} HBS\<}
private void fixUp(int k) { 4`m~FNVS
while (k > 1) { G2bDf-1ew
int j = k >> 1; x!LQxoNF
if (queue[j]>queue[k]) t]jFo
break; *g}Yw
SortUtil.swap(queue,j,k); 8BOZh6BV
k = j; ,l YE
} W!Hm~9fz
} ^&@w$
>@xrs
} &Mq~T_S
\>LnLH(
} L!0OC''C
2WX7nK;I
SortUtil： J]lrS
(.wIe/
package org.rut.util.algorithm; wI]"U2L5
tz4 ]qOH8
import org.rut.util.algorithm.support.BubbleSort; ^z1&8k"[^
import org.rut.util.algorithm.support.HeapSort; KqBk~-G
import org.rut.util.algorithm.support.ImprovedMergeSort; #} ~qqJ G2
import org.rut.util.algorithm.support.ImprovedQuickSort; -}O1dEn.
import org.rut.util.algorithm.support.InsertSort; vE@!{*
import org.rut.util.algorithm.support.MergeSort; ^k5ll=}
import org.rut.util.algorithm.support.QuickSort; )'17r82a
import org.rut.util.algorithm.support.SelectionSort; <h%O?mkC
import org.rut.util.algorithm.support.ShellSort; {;toI
gb ^?l~SS
/** MFTkqbc
* @author treeroot J;_}lF9d@
* @since 2006-2-2 X[`bMa7IB(
* @version 1.0 b2aF 'y/
*/ EVp,Q"V]
public class SortUtil { wW>zgTG
public final static int INSERT = 1; xh7cVE[UM
public final static int BUBBLE = 2; ]#7zk9
public final static int SELECTION = 3; }bY;q-
public final static int SHELL = 4; 2 rw%H
public final static int QUICK = 5; 1) ta
public final static int IMPROVED_QUICK = 6; BdlVabQyKW
public final static int MERGE = 7; 7K)6^r^
public final static int IMPROVED_MERGE = 8; I2nF-JzD2a
public final static int HEAP = 9; 3vcO!6Z5
t`*!w|}(1
public static void sort(int[] data) { ~\{^%~[48
sort(data, IMPROVED_QUICK); *Qugv^-
} ~U;rw&'H
private static String[] name={ S*j6OwZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3"o"fl
}; s!n<}C
(WJ${OW
private static Sort[] impl=new Sort[]{ ?A(QyaKz
new InsertSort(), xX*H7#
new BubbleSort(), wP[t0/dl
new SelectionSort(), !vG'J\*xc
new ShellSort(), WVVJ
new QuickSort(), f|O{#AC
new ImprovedQuickSort(), Q+g!V5'
new MergeSort(), b Q]/?cCYV
new ImprovedMergeSort(), (Qa/EkE^*w
new HeapSort() Cmc3k,t
}; foJdu+^
,9WBTH8
public static String toString(int algorithm){ aW>6NDq(
return name[algorithm-1]; bh^LIU
} $<:E'^SAS
`PY>Hgb
public static void sort(int[] data, int algorithm) { [9Ss#~
impl[algorithm-1].sort(data); sC9&Dgkk
} K~@Mg1R
'1M7M(va
public static interface Sort { 0eK*9S]
public void sort(int[] data); W 4F\}A
} k0T?-iM
)M)7"PC
public static void swap(int[] data, int i, int j) { v\p;SwI
int temp = data; \&H nKhI
data = data[j]; *S/_i-ony
data[j] = temp; H$I=W>;
} L!=QR8?@E
} a4irokJv#