[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; ?V~vP%1
} R7h3O0@!
int i1=l; f?16%Rk<
int i2=mid+1; u35"oLV6}#
for(int cur=l;cur<=r;cur++){ nC?Lz1re
if(i1==mid+1) M*Q}^<E*
data[cur]=temp[i2++]; =E(ed,gH8
else if(i2>r) BT$Oh4y4
data[cur]=temp[i1++]; #IDLfQ5g
else if(temp[i1] data[cur]=temp[i1++]; Oi@|4mo
else eZhF<<Y
data[cur]=temp[i2++]; RHbbj}B
} $Tt.r
} LZ&I<ID`-
v:w^$]4
} FGm!|iI
XVo+ <&
改进后的归并排序: Be^"sC
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package org.rut.util.algorithm.support; WyM2h
d6??OO=~>M
import org.rut.util.algorithm.SortUtil; @`^Z5n.4
Z0XQ|gkH
/** /L|x3RHs
* @author treeroot +9yMtR
* @since 2006-2-2 eIf-7S]m
* @version 1.0 0~DsA Ua
*/ jJ'NYG
public class ImprovedMergeSort implements SortUtil.Sort { SD@ 0X[
FlrYXau
private static final int THRESHOLD = 10; DFRgn
O9ro{ k
/* z 9WeOs
* (non-Javadoc) #~qzaETv,
* uFlf#t =
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wM-H5\9n
*/ _c:th{*
public void sort(int[] data) { /_8nZVu
int[] temp=new int[data.length]; uI9+@oV
mergeSort(data,temp,0,data.length-1); z-sq9Qp&x
} f^IB:e#j;
r5$!41
private void mergeSort(int[] data, int[] temp, int l, int r) { "W9z>ezp
int i, j, k; i2[8^o`_
int mid = (l + r) / 2; x~D8XN{
if (l == r) 2jkma :$'
return; R4DfqX
if ((mid - l) >= THRESHOLD) Tn\{*A
mergeSort(data, temp, l, mid); ol {N^fiK
else <1_3`t
insertSort(data, l, mid - l + 1); q,;wD1_wG
if ((r - mid) > THRESHOLD) K&"X7fQ
mergeSort(data, temp, mid + 1, r); Nm%#rZrN~Q
else 'bg'^PN>z
insertSort(data, mid + 1, r - mid); cw0uLMqr`
rx<P#y]3)
for (i = l; i <= mid; i++) { {QOy' 8/
temp = data; [l<&eI&ln
} K(TejW#
for (j = 1; j <= r - mid; j++) { Q0ba;KPm
temp[r - j + 1] = data[j + mid]; dAM]ZR<
} [ThAvQ_$
int a = temp[l]; L EFLKC
int b = temp[r]; xv%]g=Q
for (i = l, j = r, k = l; k <= r; k++) { 'jye*
if (a < b) { "Rtt~["%
data[k] = temp[i++]; [.CP,Ly
a = temp; l$R9c+L=
} else { 3&+nV1
data[k] = temp[j--]; #|=lU4Bf
b = temp[j]; 'S&Zq:
} {* w _*
} ETdN<}m
} :$P1ps3B
cXYE!(
/** 6C ?,V3Z
* @param data <R%TCVwC@
* @param l 7(|f@Y~*
* @param i 3Jj&wHp]
*/ .>1Y-NM
private void insertSort(int[] data, int start, int len) { }-9 c1&m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y*=Ipdj
} VG50n<m9
} Q=#FvsF#z3
} 2j]uB0
} EDF0q i
.%M80X{5~
堆排序： <l eE.hhf.
mSk";UCn
package org.rut.util.algorithm.support; 8-@HzS%
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import org.rut.util.algorithm.SortUtil; 4<f^/!9w
LIyb+rH#yg
/** wk1/&
* @author treeroot WB `h)
* @since 2006-2-2 vM:c70=
* @version 1.0 _({wJ$aYC
*/ # 00?]6`z
public class HeapSort implements SortUtil.Sort{ {V8uk$
u?'J1\z
/* (non-Javadoc) ~I~lb/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W?[ C au-
*/ ^7=h%{>=
public void sort(int[] data) { |M18/{
MaxHeap h=new MaxHeap(); QpS7nGev
h.init(data); jI<_(T
for(int i=0;i h.remove(); {*<%6?
System.arraycopy(h.queue,1,data,0,data.length); 82o|(pw
} tOo\s&j
ogJ';i/o
private static class MaxHeap{ ([7XtG/?
\vS >jB
void init(int[] data){ z&jASL
this.queue=new int[data.length+1]; ~b4kV)[ q
for(int i=0;i queue[++size]=data; `-?`H>+OG
fixUp(size); ^nDa-J$
} ~4mRm!DP
} Ua~8DdW
7d+0'3%
private int size=0; /1Ss |.
v0T?c53?
private int[] queue; xokA_3,1F
t{`krs``
public int get() { /neY2D6
return queue[1]; jBd=!4n
} J2Qt!-
h*3{IHAQ
public void remove() { G+I->n-s4
SortUtil.swap(queue,1,size--); !:}m-iqQ1
fixDown(1); Deq@T {
} ,v?FR }v
file://fixdown d\8j!F^=
private void fixDown(int k) { TFzk5
int j; ~c*kS E2X
while ((j = k << 1) <= size) { (aq-aum-I
if (j < size %26amp;%26amp; queue[j] j++; 4i<GqG
if (queue[k]>queue[j]) file://不用交换 #wkSru&LS
break; ZQ'|B
SortUtil.swap(queue,j,k); hb9HVj
k = j; 0vMKyT3 c
} vTL/% SJ8
} D@]/%;
private void fixUp(int k) { btbuE
while (k > 1) { z<J2e^j
int j = k >> 1; RS@G.|
if (queue[j]>queue[k]) :u)Qs#'29
break; YHxQb$v)
SortUtil.swap(queue,j,k); cxx8I
k = j; '+c@U~d*7
} lAo4)
} Y3-f68*(
xZ SDA8kS
} ]Z52L`k
1{1mL-I;
} ['3E'q,4&
#nmh=G?\Sm
SortUtil： ^ q3H
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package org.rut.util.algorithm; 5'<mfY'B
aN!,\D
import org.rut.util.algorithm.support.BubbleSort; ,kl``w|1M
import org.rut.util.algorithm.support.HeapSort; *)vy%\
import org.rut.util.algorithm.support.ImprovedMergeSort; R0|4KT-i
import org.rut.util.algorithm.support.ImprovedQuickSort; ]3Jb$Q@
import org.rut.util.algorithm.support.InsertSort; 4ti,R'
import org.rut.util.algorithm.support.MergeSort; $if(n||
import org.rut.util.algorithm.support.QuickSort; rX)_!mR
import org.rut.util.algorithm.support.SelectionSort; ]u:Ij|.'y0
import org.rut.util.algorithm.support.ShellSort; kxmsrQ>av
=?N$0F!
/** 6}Rb-\N
* @author treeroot h${=gSJc
* @since 2006-2-2 _SH~.Mt_!
* @version 1.0 7h>,
*/ Zlygx
public class SortUtil { R0G!5>1i
public final static int INSERT = 1; qca=a}
public final static int BUBBLE = 2; Pu'NSNT
public final static int SELECTION = 3; z f>(Y7M
public final static int SHELL = 4; o|_9%o52'
public final static int QUICK = 5; [<>%I#7ulG
public final static int IMPROVED_QUICK = 6; IGlM} ?x
public final static int MERGE = 7; }Nma %6PfV
public final static int IMPROVED_MERGE = 8; $+,kibk*R
public final static int HEAP = 9; R3.8Dr0f
9! yDZ<s
public static void sort(int[] data) { BL-7r=Z
sort(data, IMPROVED_QUICK); 6_:KFqc W
} w{4#Q[
private static String[] name={ iRM ?_|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" + +Eu.W;&#
}; ME.!l6lm\
Qtt3;5m
private static Sort[] impl=new Sort[]{ |D[LU[<C
new InsertSort(), E 0@u|
new BubbleSort(), ]Y$jc
new SelectionSort(), m';4`Y5-
new ShellSort(), *Xn6yL9
new QuickSort(), H|'n|\{lt
new ImprovedQuickSort(), Y^XZ.R
new MergeSort(), O:8Ne*L`D
new ImprovedMergeSort(), jLw|F-v-l<
new HeapSort() -U;=]o1
}; c_aj-`BKp
kZR(0, W
public static String toString(int algorithm){ /03?(n= 3
return name[algorithm-1]; .\3gb6S}
} ~K ('t9|
DU-dIqi
public static void sort(int[] data, int algorithm) { o@L '|#e
impl[algorithm-1].sort(data); (?i4P5s[!
} }}oIZP\qM
s%A?B8,
public static interface Sort { cs[nFfM
public void sort(int[] data); v|@EuN14<
} F'@9kdp
j@4]0o
public static void swap(int[] data, int i, int j) { mILCC}Kt
int temp = data; f?(g5o*2
data = data[j]; Oe;1f#`5
data[j] = temp; Fz5eCe\B
} Ci2*5n<
} AdzdYZiM_