[JAVA]用Java实现的各种排序

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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; JOBz{;:R{
} _ XE;-weE
int i1=l; 8 AFMn[{
int i2=mid+1; 807al^s x
for(int cur=l;cur<=r;cur++){ sffhPX\I
if(i1==mid+1) B@-|b
data[cur]=temp[i2++]; ?4^};wDb2
else if(i2>r) {!L=u/qs"
data[cur]=temp[i1++]; 0|g[o:;fl_
else if(temp[i1] data[cur]=temp[i1++]; '%R<"
else Pp,Um(
data[cur]=temp[i2++]; :^n*V6.4
} ]k[x9,IU\y
} Hi^35
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} 6DB0ni
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改进后的归并排序: `M&P[.9Pz
9I85EcT^4"
package org.rut.util.algorithm.support; >-b&v$
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import org.rut.util.algorithm.SortUtil; Z a! gbt
sa*g
/** /iplU
* @author treeroot j_p`Ng
* @since 2006-2-2 mjbTy"}"
* @version 1.0 t<Ot|Ex
*/ :$NsR*Cq*9
public class ImprovedMergeSort implements SortUtil.Sort { *ot>WVB
wTxbDT@H5
private static final int THRESHOLD = 10; 8) HBh7/
CphFv!k'Z
/* S_6g~PHsr
* (non-Javadoc) !NTH.U:g
* P$_&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~(P&g7u
*/ LT/mb2
public void sort(int[] data) { )>V?+L5M
int[] temp=new int[data.length]; zVw:7-
mergeSort(data,temp,0,data.length-1); O5zE {#
} u"`*DFjo*
S`0NPGn;@[
private void mergeSort(int[] data, int[] temp, int l, int r) { /'ZKST4
int i, j, k; {=67XrWN1
int mid = (l + r) / 2; R::zuv
if (l == r) kO1}?dWpa
return; lbTV$A
if ((mid - l) >= THRESHOLD) ;r.EC}>m
mergeSort(data, temp, l, mid); sef]>q
else Huc|6~X
insertSort(data, l, mid - l + 1); Zyu/|Og
if ((r - mid) > THRESHOLD) ^XG*z?Tt
mergeSort(data, temp, mid + 1, r); `PgdJrE
else ZIDbqQu
insertSort(data, mid + 1, r - mid); 7VAJJv3
RbEKP(uw
for (i = l; i <= mid; i++) { ygzxCn|#
temp = data; .1#kDM
} 0OnV0SIL
for (j = 1; j <= r - mid; j++) { D<>@ %"%
temp[r - j + 1] = data[j + mid]; Qs%B'9")
} 2z\e\I
int a = temp[l]; tlQC6Fb#
int b = temp[r]; ,$N#Us(Wa
for (i = l, j = r, k = l; k <= r; k++) { _[t8rl
if (a < b) { o:~LF6A-
data[k] = temp[i++]; 2%]Z Kd
a = temp; Z.1> kZ
} else { * ?]~ #
data[k] = temp[j--]; [c~kF+8
b = temp[j]; MjD75hIZ
} 6KRO{QK
} eTbg7"waA
} i{Ds&{
\~~}N4
/** wNYg$d0M
* @param data 6;iJ*2f5V
* @param l @1:0h9%
* @param i 2YlH}fnH
*/ 9t$]X>}
private void insertSort(int[] data, int start, int len) { M'L;N!1A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .4-,_`T?
} /?*]lH.
} G^;>8r
} y >+mc7n
} [0y$! f4
!)pdamdA
堆排序： Ef)yQ
2VGg 6%
package org.rut.util.algorithm.support; 'e!J06
g[[;w*;z
import org.rut.util.algorithm.SortUtil; CU)|-*uiK
=1.9/hW
/** ])}]/Qw
* @author treeroot 8gy_Yj&{P
* @since 2006-2-2 [yS#O\$'e
* @version 1.0 [eUftr9&0
*/ qfoD
public class HeapSort implements SortUtil.Sort{ t#i,1aHA
E3aDDFDH
/* (non-Javadoc) N?P%-/7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <RNJ>>0
*/ jE\Sm2G9
public void sort(int[] data) { ep/Y^&$M
MaxHeap h=new MaxHeap(); rXfy!rD_P_
h.init(data); 7msAhz
for(int i=0;i h.remove(); nh>K`+>co
System.arraycopy(h.queue,1,data,0,data.length); ._O
} RQB 4s^t
x1&W^~
private static class MaxHeap{ cLVeT
RsJ6OFcWV
void init(int[] data){ CQh,~
this.queue=new int[data.length+1]; NMOut@
for(int i=0;i queue[++size]=data; 5L,}e<S$
fixUp(size); Q[F}r`
} U.!lTLjfLz
} -Go 7"j
??60,m:]
private int size=0; y:m_tv0~0
e[_m<e
private int[] queue; mtz#}qD66
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public int get() { ^z6_Uw[
return queue[1]; -!W<DJ*
} rE9I>|tX
!`41q=r
public void remove() { V-'K6mn;
SortUtil.swap(queue,1,size--); w }^ I
fixDown(1); o6 E!IX+
} X4l@woh%
file://fixdown &e-U5'(6v_
private void fixDown(int k) { \.YS%"Vz
int j; K*UgX(xu4P
while ((j = k << 1) <= size) { ,1OyN]f3
if (j < size %26amp;%26amp; queue[j] j++; w}Uhd,
if (queue[k]>queue[j]) file://不用交换 b306&ZVEk
break; HK|ynBAo
SortUtil.swap(queue,j,k); &nBa=Enf
k = j; %NL^WG:
} D?XM,l+
} [ i#zP
private void fixUp(int k) { ^WBuMCe
while (k > 1) { ;q N+^;,2
int j = k >> 1; yE[#ze
if (queue[j]>queue[k]) sBrI}[oyx
break; 2{|h8oz
SortUtil.swap(queue,j,k); 3gd&i
k = j; J{^RkGF
} GFr|E8
} Hx,0zS%>
K2%w0ohC
} (Jz;W<E
y ]?V~%
} ME'|saP
o sKKt?^?
SortUtil： |2{wG4
M1KqY:9E
package org.rut.util.algorithm; >jD[X5Y
,#pXpAz/
import org.rut.util.algorithm.support.BubbleSort; }.s~T#v
import org.rut.util.algorithm.support.HeapSort; E[Cb|E
import org.rut.util.algorithm.support.ImprovedMergeSort; Z+@2"%W
import org.rut.util.algorithm.support.ImprovedQuickSort; Qxj JN^Q
import org.rut.util.algorithm.support.InsertSort; zOQ>d|p?X
import org.rut.util.algorithm.support.MergeSort; "etPT@gF
import org.rut.util.algorithm.support.QuickSort; 9k{PBAP
import org.rut.util.algorithm.support.SelectionSort; w*R$o
import org.rut.util.algorithm.support.ShellSort; _a1x\,R|DB
..rOsg{
/** VkZ7#
* @author treeroot 72'5%*1
* @since 2006-2-2 "I(xgx*
* @version 1.0 BCA&mi3q
*/ o}ZdTf=
public class SortUtil { e=.]F*:J
public final static int INSERT = 1; }sxYxn~
public final static int BUBBLE = 2; r?/'!!4
public final static int SELECTION = 3; (DI>5.x"
public final static int SHELL = 4; cFJY^A
public final static int QUICK = 5; RsYU59_Y
public final static int IMPROVED_QUICK = 6; uCcYPvm
public final static int MERGE = 7; Dd\jHF>u
public final static int IMPROVED_MERGE = 8; 4ecP*g
public final static int HEAP = 9; '*3h!lW1.
EVGt 5z
public static void sort(int[] data) { =zz~kon9
sort(data, IMPROVED_QUICK); *6VF $/rP
} 8SGo9[U2
private static String[] name={ O&Y*pOg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'ET~
}; MjU6/pO}L
9gmW&{6q
private static Sort[] impl=new Sort[]{ &wV]"&-
new InsertSort(), %rv7Jy
new BubbleSort(), b}"N`,0dO
new SelectionSort(), -X"p:=;j
new ShellSort(), 3qf Ym}d
new QuickSort(), ZusEfh?
new ImprovedQuickSort(), lz?$f4TzA
new MergeSort(), Rd#WMo2Xd
new ImprovedMergeSort(), y2^Y/)
new HeapSort() @"^0%/2-
}; '!eKTC>
p"KFJ
public static String toString(int algorithm){ :s7m4!EF
return name[algorithm-1]; &__es{;P
} 0"pAN[=K@
fR(d
public static void sort(int[] data, int algorithm) { 0|{u{w@!`
impl[algorithm-1].sort(data); TOB]IrW
} # mV{#B=
=ACVE;L?
public static interface Sort { AT2nVakL
public void sort(int[] data); A\HxDIU
} +nJgl8'^y
|Uc_G13Y{D
public static void swap(int[] data, int i, int j) { (KDD e}f
int temp = data; sTn<#l6
data = data[j]; ~T1XLu
data[j] = temp; )-a'{W/t
} [PNT\ElT
} tFp Ygff<