[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; I@ D<rjR
} 3XhLn/@
int i1=l; BHR(B]EI
int i2=mid+1; e#^vA$d
for(int cur=l;cur<=r;cur++){ wUH:l
if(i1==mid+1) @6VkNe9
data[cur]=temp[i2++]; X4/3vY
else if(i2>r) Kza5_7p`L
data[cur]=temp[i1++]; OySn[4`(i
else if(temp[i1] data[cur]=temp[i1++]; e?<$H\
else &XB1=b5
data[cur]=temp[i2++]; {CQI*\O
} 3^]Kd
} smPZ%P}P+c
h%&2M58:
} oiItQ4{<
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改进后的归并排序: 8xx2+
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package org.rut.util.algorithm.support; ; g\rY
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import org.rut.util.algorithm.SortUtil; ^t P|8k
})C}'!+]
/** =~'y'K]
* @author treeroot }8Nr.gY
* @since 2006-2-2 @+Anp4%;Y
* @version 1.0 @!B%ynrG
*/ h%] D[g
public class ImprovedMergeSort implements SortUtil.Sort { Xbc:Vr
J )UCy;Y
private static final int THRESHOLD = 10; "cGjHy\j`
e\! ic
/* vq1u!SY
* (non-Javadoc) D:XjJMW3r
* $|K-wN[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j=Z;M1
*/ J'*`K>wV
public void sort(int[] data) { v4r%'bA
int[] temp=new int[data.length]; yK w.69.
mergeSort(data,temp,0,data.length-1); Dj{=Y`Tw
} _^p\ u
90">l^HX=
private void mergeSort(int[] data, int[] temp, int l, int r) { \'+P5,
int i, j, k; r[3 2'E
int mid = (l + r) / 2; Iy@6cd,)S
if (l == r) )@6iQ
return; w5q'M
if ((mid - l) >= THRESHOLD) FLQ>,=O
mergeSort(data, temp, l, mid); ~X,ZZ 9H
else Ki\J)l
insertSort(data, l, mid - l + 1); p*~b5'+ C+
if ((r - mid) > THRESHOLD) N2&h yM
mergeSort(data, temp, mid + 1, r); K5 Z'kkOk
else LuWY}ste
insertSort(data, mid + 1, r - mid); t{O2JF#5u
J"Nn.iVq
for (i = l; i <= mid; i++) { #4F0o@Z
temp = data; ]EEac
} &J,&>CFc
for (j = 1; j <= r - mid; j++) { 8YO` TgW
temp[r - j + 1] = data[j + mid]; +[Q`I*C
} ML7qrc;Rx
int a = temp[l]; v(^;%
int b = temp[r]; b\C1qM4
for (i = l, j = r, k = l; k <= r; k++) { 4GexYDk'#
if (a < b) { `Lr|KuFN
data[k] = temp[i++]; Q;=3vUN
a = temp; cfL:#IM
} else { b#Vm;6BHD1
data[k] = temp[j--]; $Fv|w9
b = temp[j]; 2 P9{?Y
} 9.Yn]O
} wcW}Sv[r
} ] jycg@=B
vzZ"TSP
/** 6IKi*}
* @param data I~25}(IDZ"
* @param l ]_2<uK}fg
* @param i r-5xo.J'
*/ 6QNO#!;
private void insertSort(int[] data, int start, int len) { %=5m!"F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :7pt=IA
} \/?&W[TF
} `,Y/!(:;
} H'x_}y
} yOyuMZo6
Y|aaZ|+
堆排序： |],ocAN{
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package org.rut.util.algorithm.support; %R?#Y1Tq;
3.@ir"vy
import org.rut.util.algorithm.SortUtil; j\2q2_f
9Nu:{_YoP
/** >RXDuCVi
* @author treeroot ^Kn:T`vB
* @since 2006-2-2 \0z<@)r+AJ
* @version 1.0 qoOq47F
*/ $rH}2
public class HeapSort implements SortUtil.Sort{ lfte
_tfi6UQ&lY
/* (non-Javadoc) 8v\^,'@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R^Y_i
*/ |4F'Zu}g>
public void sort(int[] data) { ,zh4oX`>
MaxHeap h=new MaxHeap(); 3|0OW Jk
h.init(data); }N@+bNh~
for(int i=0;i h.remove(); 8C<%Y7)/
System.arraycopy(h.queue,1,data,0,data.length); o*xft6U
} -\M;bQV[C
idNg&'
private static class MaxHeap{ Ui}%T]
=7-@&S=?s
void init(int[] data){ d.p%jVO)"
this.queue=new int[data.length+1]; E~1"Nh
for(int i=0;i queue[++size]=data; cB}6{c$_sW
fixUp(size); H`NT`BE
} Vn6]h|vm
} !p(N DQm
Ky)*6QOw
private int size=0; ^zR*s |1Q
{Zf 9} !qF
private int[] queue; _yc&'Wq
?9;r|G
public int get() { A(wuRXnVWK
return queue[1]; !k8j8v&
} M[?0 ^ FBx
dU#}Tk
public void remove() { +D|E8sz8
SortUtil.swap(queue,1,size--); -h{|u{t
fixDown(1); >:f&@vwm
} Uw->5
file://fixdown $ cYKVhf
private void fixDown(int k) { S&F
int j; @+!u{
while ((j = k << 1) <= size) { w7yz4_:x^
if (j < size %26amp;%26amp; queue[j] j++; %#@5(_'
if (queue[k]>queue[j]) file://不用交换 h3P^W(=&
break; 2g%p9-MO]I
SortUtil.swap(queue,j,k); $ 1v'CT
k = j; F+?g0w['
} NSQ#\:3:S
} 9v(k<('_
private void fixUp(int k) { 3/4r\%1b+
while (k > 1) { 4!DXj0^
int j = k >> 1; 6_O3/
if (queue[j]>queue[k]) *."50o=T
break; F'^?s= QX
SortUtil.swap(queue,j,k); YUQKy2
k = j; X&cm)o%5Fe
} g)^g_4
} M]A!jWtE
YCo qe,5
} }Z8DVTpX}
GA2kg7
} YY 8vhnw
T&s}~S=m
SortUtil： S/xCX!
Mt%=z9OLq9
package org.rut.util.algorithm; lAo S 9w
wZKEUJpQ
import org.rut.util.algorithm.support.BubbleSort; p]J0A ^VV
import org.rut.util.algorithm.support.HeapSort; ?eri6D,86w
import org.rut.util.algorithm.support.ImprovedMergeSort; gR@,"6b3
import org.rut.util.algorithm.support.ImprovedQuickSort; yPVK>em5
import org.rut.util.algorithm.support.InsertSort; +X!QH/ 8
import org.rut.util.algorithm.support.MergeSort; _Wgpk0
import org.rut.util.algorithm.support.QuickSort; Bngvm9k3
import org.rut.util.algorithm.support.SelectionSort; 7aJ:kumDZ
import org.rut.util.algorithm.support.ShellSort; 31~Rs?~f(
&E`=pe/e
/** 287)\FU;3
* @author treeroot 4pZ=CB+j
* @since 2006-2-2 l]z=0
* @version 1.0 nsyeid*
*/ u]s}@(+.
public class SortUtil { _?a.S8LxJZ
public final static int INSERT = 1; ,_RPy2N
public final static int BUBBLE = 2; :x36Z4:
public final static int SELECTION = 3; Yo[Pu< zR
public final static int SHELL = 4; P2sM3C
public final static int QUICK = 5; 's 'H&sa
public final static int IMPROVED_QUICK = 6; : 5<u!-}
public final static int MERGE = 7; 4?.L+wL
public final static int IMPROVED_MERGE = 8; W4n(6esO
public final static int HEAP = 9; AMc`qh
y~;w`5;|
public static void sort(int[] data) { 8&UwnEk<
sort(data, IMPROVED_QUICK); %2<u>=6byG
} SX@zDuM
private static String[] name={ Y@Ti2bI`v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B%/N{i*Z
}; H:.l:PJ
MNd[Xzm
private static Sort[] impl=new Sort[]{ (5Sv$Xt
new InsertSort(), \#q|.d$u
new BubbleSort(), CC.ri3+.
new SelectionSort(), OmAa$L,'w
new ShellSort(), 41NVF_R6J
new QuickSort(), %mMPALN]{
new ImprovedQuickSort(), w}r~Wk^dLI
new MergeSort(), K#4Toc#=V
new ImprovedMergeSort(), IhPX/P
new HeapSort() Z$:iq
}; *{s 3.=P.
*1CZRfWI
public static String toString(int algorithm){ q1vsvL9Q
return name[algorithm-1]; >!%F$$
} 2~RG\JWTA
.Fm@OQr
public static void sort(int[] data, int algorithm) { #Hi$squJ
impl[algorithm-1].sort(data); Bf{c4YiF
} |}naI_Qudv
!\/J|~XZ
public static interface Sort { G2!J`}
public void sort(int[] data); eD?f|bif
} &AhkP=Yw
zHk7!|%Y
public static void swap(int[] data, int i, int j) { TI}Y U
int temp = data; q@Oe}
data = data[j]; *PF=dx<8
data[j] = temp; x5 ?>y{6D
} d.t$VRO
} ;)rXQm