[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; .@Z-<P"
} fE\;Cbi
int i1=l; UqaLTdYG
int i2=mid+1; 5z8!Nmb/
for(int cur=l;cur<=r;cur++){ {%S>!RA
if(i1==mid+1) m)A~1+M$)L
data[cur]=temp[i2++]; !,mv 7Yj
else if(i2>r) 'g8~uP
data[cur]=temp[i1++]; <bPn<QI
else if(temp[i1] data[cur]=temp[i1++]; :EISms
else A~CQ@
data[cur]=temp[i2++]; ,= ;d<O8
} UIUCj8QJg
} `7|\Gqy
hhTM-D1Ehs
} !BN7 B
+H[GD!
改进后的归并排序: ;:nO5VFOg
TSQ/{=r
package org.rut.util.algorithm.support; :V>M{vd
By|y:
import org.rut.util.algorithm.SortUtil; zV(F9}^
MtYi8"+<e.
/** C:77~f-+rQ
* @author treeroot ?fB}9(6
* @since 2006-2-2 r-#23iT.~
* @version 1.0 %&L]k>n^
*/ 0hTv0#j#
public class ImprovedMergeSort implements SortUtil.Sort { . Q3GA0O
T{1Z(M+
private static final int THRESHOLD = 10; 6e1/h@p\7
?@"B:#l
/* 3YyB0BMW
* (non-Javadoc) JzA`*X[
* S ^?&a5{o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _yQ*
*/ F&r+"O)^-R
public void sort(int[] data) { .6Swc?
int[] temp=new int[data.length]; Jsi [,|G
mergeSort(data,temp,0,data.length-1); H\tz"<*``
} B_w;2ZuA
&j}\ZD
private void mergeSort(int[] data, int[] temp, int l, int r) { M6E.!Cs
int i, j, k; @Oe!*|?mS
int mid = (l + r) / 2; Py$*c
if (l == r) 5gP#V K
return; `nA_WS
if ((mid - l) >= THRESHOLD) U88-K1G
mergeSort(data, temp, l, mid); YYDLFtr2
else >|jSd2_p
insertSort(data, l, mid - l + 1); <r (Y:2
if ((r - mid) > THRESHOLD) S$q:hXZ#e
mergeSort(data, temp, mid + 1, r); g>h5NrDN
else jHPJk8@y
insertSort(data, mid + 1, r - mid); #/'5N|?
)Yvf9dl
for (i = l; i <= mid; i++) { $ig%YB
temp = data; .W{\wkn
} .d:sQ\k~=
for (j = 1; j <= r - mid; j++) { Ea@N:t?(8=
temp[r - j + 1] = data[j + mid]; ag*RQ
} eR.ucTji
int a = temp[l]; >Zk$q~'+
int b = temp[r]; Km2ppGLNn
for (i = l, j = r, k = l; k <= r; k++) { X%7Y\|
if (a < b) { >jjuWO3T
data[k] = temp[i++]; @DYxxM-
a = temp; @&;y0N1xo
} else { <>,V>k|
data[k] = temp[j--]; T)Byws
b = temp[j]; "(/ 1]EH`
} (,eH*/~/
} 6 flc
} \HFeEEKH
g+gHIb7{
/** (q+U5Ls6
* @param data 0eY$K7 U
* @param l *V(TNLIh;
* @param i LGq}wxq
*/ EJP##eGx
private void insertSort(int[] data, int start, int len) { olzP=08aaV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I^'kt[P'FZ
} 'ypJGm
} @)mH"u!(7
} K1O0/2O
} |,F/_
)P\Vd #
堆排序： ,mH2S/<}S
]Lq9Ompf(t
package org.rut.util.algorithm.support; cCN[c)[c|
L_uliBn
import org.rut.util.algorithm.SortUtil; O#Ab1FQn
\?)@ #Qs
/** 6P;JF%{J
* @author treeroot N<ww&GXBX
* @since 2006-2-2 \k;)m-0bj{
* @version 1.0 ou6|;*>d
*/ IbAGnl{
public class HeapSort implements SortUtil.Sort{ <\c5
6R% I)
/* (non-Javadoc) EeWCy5W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u= ( kii=/
*/ RWf4Wh?d
public void sort(int[] data) { +^hFs7je)
MaxHeap h=new MaxHeap(); #LEK?]y
h.init(data); +hg|!SS@5
for(int i=0;i h.remove(); zRsG$)B
System.arraycopy(h.queue,1,data,0,data.length); A<.`HCv2
} 0hK)/!Y
s<x2*yVUA
private static class MaxHeap{ ?}y?e}y*xZ
uNV(r"
void init(int[] data){ pulE6T7x
this.queue=new int[data.length+1]; CZg$I&x
for(int i=0;i queue[++size]=data; 6JBE=9d-Q
fixUp(size); I0oM\~#
} Ro`Hm8o/
} nb0V~W
,6?L.L
private int size=0; +avu&2B
rwr>43S5<3
private int[] queue; :~BY[")
k0.|%0?K
public int get() { dC;@ Fn
return queue[1]; E`.dU<8HE
} Hw[u Sv8
L!:}
public void remove() { 01q5BQ7u
SortUtil.swap(queue,1,size--); g83]/s+
fixDown(1); x7 jE Ns )
} qazM@
file://fixdown \"i2E!
private void fixDown(int k) { ^yiRrcOo
int j; [_ESR/&N
while ((j = k << 1) <= size) { u$d T^c
if (j < size %26amp;%26amp; queue[j] j++; "1_eZ`
if (queue[k]>queue[j]) file://不用交换 * 3mF.^
break; )2C`;\/:
SortUtil.swap(queue,j,k); /,A:HM>B
k = j; QcG4~DEX4
} ^.y}2
} <hgt{b4
private void fixUp(int k) { iqURlI);P
while (k > 1) { /qA\|'~
int j = k >> 1; JX@/rXFY}
if (queue[j]>queue[k]) HkFoyy
break; J<BBM.^]
SortUtil.swap(queue,j,k); P#bZtWx'<N
k = j; r`}')2
} Au08k}h<G
} ;muxIr`?
Dsc{- <v
} Z?Y14L~%
v)>R)bzqe
} >8+:{NW
jHq.W95+P
SortUtil： s,O:l0
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package org.rut.util.algorithm; V9qA.NV2
^6`"f
import org.rut.util.algorithm.support.BubbleSort; 8R}CvzI
import org.rut.util.algorithm.support.HeapSort; W>+\A"
import org.rut.util.algorithm.support.ImprovedMergeSort; rkh+$*t@i7
import org.rut.util.algorithm.support.ImprovedQuickSort; =B_vQJF2
import org.rut.util.algorithm.support.InsertSort; +T02AS
import org.rut.util.algorithm.support.MergeSort; Ew1> m'
import org.rut.util.algorithm.support.QuickSort; |u{NM1,
import org.rut.util.algorithm.support.SelectionSort; <z+5+h|^
import org.rut.util.algorithm.support.ShellSort; @DG$
fvgjqiT
/** [=imF^=3Vb
* @author treeroot ,,vl+Z<&
* @since 2006-2-2 ["VUSa
* @version 1.0 o8c4h<,
*/ oZTKG'
public class SortUtil { GF[onfQY7
public final static int INSERT = 1; H$Om{r1j
public final static int BUBBLE = 2; JJ_77i
public final static int SELECTION = 3; K9h{sC
public final static int SHELL = 4; WZ`u"t^2V
public final static int QUICK = 5; mb_*FJB-_
public final static int IMPROVED_QUICK = 6; $6Z@0H@X
public final static int MERGE = 7; 4sOo>.<x
public final static int IMPROVED_MERGE = 8; bC{1LY0
public final static int HEAP = 9; eCHT)35u
K1]m:Y<
public static void sort(int[] data) { V*HkFT
sort(data, IMPROVED_QUICK); i|A0G%m]$
} k4Ed7T-
private static String[] name={ G*.}EoA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AB92R/
}; ";\na!MT
;s m )f
private static Sort[] impl=new Sort[]{ _qwKFC
new InsertSort(), M{:}.H<a
new BubbleSort(), rbfP6t:c3
new SelectionSort(), eiE36+'>b
new ShellSort(), GSck^o2{
new QuickSort(), 6Ap-J~4
new ImprovedQuickSort(), ? I7}4i7
new MergeSort(), A"Q6GM2;Io
new ImprovedMergeSort(), V?x&.C2Z
new HeapSort() i#c1ZC
}; ! *Snx
>9F&x>~
public static String toString(int algorithm){ !>gi9z,
return name[algorithm-1]; -DWyKR= j"
} ^lADq']
x93t.5E6
public static void sort(int[] data, int algorithm) { X;[$yW9hE
impl[algorithm-1].sort(data); |^: A,%>
} /1A3 Sw
jx*jYil
public static interface Sort { j0^%1
public void sort(int[] data); jhU'UAn
} -%R3YU3
]Dj,8tf`H
public static void swap(int[] data, int i, int j) { `v;9!ReZV
int temp = data; :2+,?#W
data = data[j]; `cu W^/c
data[j] = temp; -B+Pl*
} cOz8YVR-
} |a||oyrN