[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; vDFGd-S
} AiP!hw/V$
int i1=l; /vxm"CJR
int i2=mid+1; !m;H@KR{
for(int cur=l;cur<=r;cur++){ ml6u1+v5
if(i1==mid+1) 29&bbfU
data[cur]=temp[i2++]; iafE5b)
else if(i2>r) I9?Ec6a_
data[cur]=temp[i1++]; \]uV!)V5B
else if(temp[i1] data[cur]=temp[i1++]; V`kMCE;?l
else MHU74//fe
data[cur]=temp[i2++]; ;"kaF!
} <lE?,jl
} Z hd#:d
OhVs#^
} %Ip*Kq-
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改进后的归并排序: c9wfsapJ
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package org.rut.util.algorithm.support; AY,].Zg[
.iG&Lw\,
import org.rut.util.algorithm.SortUtil; k^\pU\J
k&/OU:7Y
/** =Yz'D|=t
* @author treeroot ~q+hV+fa>
* @since 2006-2-2 +s++7<C
* @version 1.0 $q$7^r@
*/ i/H+xrCK
public class ImprovedMergeSort implements SortUtil.Sort { C0jj(ku&
}}&#|)Yq
private static final int THRESHOLD = 10; ^uBxgWIC
? *>]")[>
/* *.#oxcll
* (non-Javadoc) >UDd @
* ~PnTaAPJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fv74bC%
*/ =WIJ>#Go<
public void sort(int[] data) { 1vzb8.
int[] temp=new int[data.length]; #bX9Tu0
mergeSort(data,temp,0,data.length-1); 99xEm
} -fS.9+k0/
C;+h.;}<D
private void mergeSort(int[] data, int[] temp, int l, int r) { MUnEuhXTr
int i, j, k; [F!Y%Zp
int mid = (l + r) / 2; >J9oH=S6
if (l == r) }%7NF*
return; #Tw@wfaq)
if ((mid - l) >= THRESHOLD) c;?fMX
mergeSort(data, temp, l, mid); 2*w0t:Yxe
else Dre2J<QL
insertSort(data, l, mid - l + 1); z2_6??tS/c
if ((r - mid) > THRESHOLD) qz?mh4Oh
mergeSort(data, temp, mid + 1, r); M(x$xAiD
else b~=0[Rv
insertSort(data, mid + 1, r - mid); t>=fTkB
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for (i = l; i <= mid; i++) { 7x);x/#8Z
temp = data; kF(n!2"W
} js iSg/
for (j = 1; j <= r - mid; j++) { WHXj8*]6
temp[r - j + 1] = data[j + mid]; SZaS;hhhHu
} [S5\#=_4S
int a = temp[l]; BTgG4F/)
int b = temp[r]; jTO), v:w
for (i = l, j = r, k = l; k <= r; k++) { b 5yW_Ozdh
if (a < b) { ;OqB5qd
data[k] = temp[i++]; W-NDBP:
a = temp; *(C(tPhC
} else { HK`I\,K
data[k] = temp[j--]; ZKHG!`X0
b = temp[j]; pRkP~ZISU
} )nL`H^
} svxw^0~a
} 8NyJc"T<.
[ ol9|sdu
/** kuyjnSo9i
* @param data ^[:p|U2mA
* @param l 1-lu\"H`
* @param i nRyU]=-X
*/ n]E?3UGD@W
private void insertSort(int[] data, int start, int len) { ,]bB9tid
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [!!Q,S"
} rj(T~d4
} }gJ(DbnV
} lXcx@#~
} o2<#s)GpY
:oJ=iB'Zc
堆排序： 'Ut7{rZ5
hjZKUMG(k
package org.rut.util.algorithm.support; 'yMF~r3J
ggJO:$?$L
import org.rut.util.algorithm.SortUtil; *S2ypzwRZ,
<HbcNE~
/** ``wSc0\
* @author treeroot s"t$0cH9
* @since 2006-2-2 >=[(^l
* @version 1.0 }Y;K~J
*/ gNt(,_]ZR
public class HeapSort implements SortUtil.Sort{ ZYC<Wb)I
]]zPq<b2
/* (non-Javadoc) z^T`x_mF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IiG6<|d8H
*/ oYukLr
public void sort(int[] data) { ^]TVo\,N
MaxHeap h=new MaxHeap(); c%MW\qx
h.init(data); l1f\=G?tmU
for(int i=0;i h.remove(); V4_=<W
System.arraycopy(h.queue,1,data,0,data.length); P9T}S
} 17`1SGZ
~]QHk?[wc
private static class MaxHeap{ /5u<78GW1
D8$G`~hD
void init(int[] data){ @nux9MX<9
this.queue=new int[data.length+1]; G K7![p
for(int i=0;i queue[++size]=data; V#iPj'*
fixUp(size); V,%=AR5
} S:OO0<W
} 5~>z h
ZzSz%z_sE
private int size=0; 8uWa=C)
0tXS3+@n=
private int[] queue; ' ~8KSF*!p
0N$v"uX@
public int get() { 9b9$GyI
return queue[1]; ME*LHr,
} >k (C
N<XNTf
public void remove() { h2XfC.f
SortUtil.swap(queue,1,size--); 7eAX*Kgt<_
fixDown(1); ev*k*0
} Ru>MFG
file://fixdown oM>Z;QVRC:
private void fixDown(int k) { G|!on<l&
int j; ?.Ca|H<
while ((j = k << 1) <= size) { ee^{hQi
if (j < size %26amp;%26amp; queue[j] j++; $42{HFGq
if (queue[k]>queue[j]) file://不用交换 a6uJYhS~
break; |>dI/_'
SortUtil.swap(queue,j,k); =w{Z@S(ukz
k = j; vkri+:S3
} Zcx`SC-0
} e]zBf;9J
private void fixUp(int k) { C$XU%5qi
while (k > 1) { 7t0er'VC
int j = k >> 1; Pu"P9
if (queue[j]>queue[k]) 1pgU}sRk
break; (&F ,AY3A
SortUtil.swap(queue,j,k); ZZzMO6US0
k = j; pC@{DW;V6R
} Qo{/@
} M 0U0;QJ
ZzJ?L4J5v
} |l]XpWV
[q8 P~l
} )QU
! t?iXZ
SortUtil： :%,:"
8|l\EVV6
package org.rut.util.algorithm; L?mrbay
JehrDC2N
import org.rut.util.algorithm.support.BubbleSort; klT@cO-9
import org.rut.util.algorithm.support.HeapSort; HMh"}I2n
import org.rut.util.algorithm.support.ImprovedMergeSort; %[ Z \S0C
import org.rut.util.algorithm.support.ImprovedQuickSort; o<pf#tifv
import org.rut.util.algorithm.support.InsertSort; +|n*b
import org.rut.util.algorithm.support.MergeSort; JR@`2YP-
import org.rut.util.algorithm.support.QuickSort; hG12ZZD
import org.rut.util.algorithm.support.SelectionSort; EVsC>rz
import org.rut.util.algorithm.support.ShellSort; G}b]w~ML~
#Y a4ps_
/** ix)M`F%P3
* @author treeroot $QN"wL||
* @since 2006-2-2 wsI`fO^A8
* @version 1.0 K;?m';z0
*/ w"-Lc4t+
public class SortUtil { gG(fQ 89U"
public final static int INSERT = 1; [\v}Ul
public final static int BUBBLE = 2; s %j_H
public final static int SELECTION = 3; uxvqMgR
public final static int SHELL = 4; +0nJ
public final static int QUICK = 5; 5m&9"T.w
public final static int IMPROVED_QUICK = 6; `ZyI!"
public final static int MERGE = 7; / F4zg3
public final static int IMPROVED_MERGE = 8; e> e}vZlX
public final static int HEAP = 9; 0"
\`~Ly-
public static void sort(int[] data) { ^/I 7|u]
sort(data, IMPROVED_QUICK); < $lCkSx<Q
} YNKHN2E8
private static String[] name={ 6xTuNE1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MyJ%`@+1
}; {?}E^5Z*g
0zmE>/O+
private static Sort[] impl=new Sort[]{ *x@Onj
new InsertSort(), .WA-&b_
new BubbleSort(), CQF:Rnb
new SelectionSort(), 5Ha9lM2gh
new ShellSort(), 5q3JI
new QuickSort(), gmw|H?]
new ImprovedQuickSort(), E7j(QOf
new MergeSort(), SJb&m-
new ImprovedMergeSort(), /R]U}o^/(%
new HeapSort() Z'`<5A%;
}; 0l)~i''
n'n/Tu
public static String toString(int algorithm){ ;K:zmH
return name[algorithm-1]; bzBEX mC
} x<tb
)~)J?l3{
public static void sort(int[] data, int algorithm) { *2pt%eav
impl[algorithm-1].sort(data); Gp?a(-K5
} [B\h$IcRv
xHvZV<#
public static interface Sort { fphv
public void sort(int[] data); *+Ek0M
} ,w<S|#W~+
md)c0Bg8~
public static void swap(int[] data, int i, int j) { LG{,c.Qj*
int temp = data; @vC4[:"pD}
data = data[j]; w'Y7IlC
data[j] = temp; Ns>- o
} +~m46eI
} N)uSG&S: