[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; iJI }TVep#
} kYP#SH/
int i1=l; CAig]=2'
int i2=mid+1; :S{BbQ){]
for(int cur=l;cur<=r;cur++){ !OhC/f(GBZ
if(i1==mid+1) R6<X%*&%
data[cur]=temp[i2++]; \_VA50
else if(i2>r) j;+b0(53
data[cur]=temp[i1++]; $lfn(b,
else if(temp[i1] data[cur]=temp[i1++]; $ZhFh{DQ.
else b4%??"&<Y
data[cur]=temp[i2++]; g-4M3of
} w_"E*9
} ONB{_X?
@p9i
} )Yh+c=6 ?
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改进后的归并排序: t9GR69v:?
^,lIK+#Elz
package org.rut.util.algorithm.support; TPQ%L@^L+
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import org.rut.util.algorithm.SortUtil; htO+z7
Y!aSs3c
/** :%_LpZ
* @author treeroot g{]0sn#
* @since 2006-2-2 8rAg\H3E
* @version 1.0 ,\W 8b-Z
*/ -lr vKrt7
public class ImprovedMergeSort implements SortUtil.Sort { A_"w^E{P
&)# ihK_
private static final int THRESHOLD = 10; b"<liGh"n-
#X+JHl
/* :[.vM
* (non-Javadoc) IEL%!RFG
* 6fE7W>la
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [t m_Mg
*/ bi',j0B
public void sort(int[] data) { :;%2BSgFU
int[] temp=new int[data.length]; KC*e/J
mergeSort(data,temp,0,data.length-1); y;m|
} i<C*j4qQ
B{n,t}z
private void mergeSort(int[] data, int[] temp, int l, int r) { ANAVn@ [
int i, j, k; jKz$@gP
int mid = (l + r) / 2; y>8sZuH0
if (l == r) nSDMOyj+
return; zH72'"w
if ((mid - l) >= THRESHOLD) m+`cS=-.
mergeSort(data, temp, l, mid); nI?[rCM
else :I.mGH!^
insertSort(data, l, mid - l + 1); (U DnsF
if ((r - mid) > THRESHOLD) Y Vt% 0
mergeSort(data, temp, mid + 1, r); OR P\b
else X~bX5b[P
insertSort(data, mid + 1, r - mid); CImWd.W9~
`P@<3]
for (i = l; i <= mid; i++) { Y,qI@n<
temp = data; hk;5w{t}}
} h]5(].
for (j = 1; j <= r - mid; j++) { Q^P}\wb>
temp[r - j + 1] = data[j + mid]; 9 &dtd
} '0;l]/i.
int a = temp[l]; ^ox=HNV
int b = temp[r]; j.[.1G*("
for (i = l, j = r, k = l; k <= r; k++) { zF`0J
if (a < b) { &Q/W~)~
data[k] = temp[i++]; F>Ah0U0
a = temp; _O)>$.^6
} else { etQCzYIhn
data[k] = temp[j--]; udK%>
b = temp[j]; w0 M>[ 4
} 1;bh^WMJ
} >%_\;svZG
} pHGYQ;:L
C$=%!wf
/** ~f2z]JLr:
* @param data O0x,lq
* @param l mX"oW_EK
* @param i 4!{KWL`A
*/ RXMISt3+{y
private void insertSort(int[] data, int start, int len) { /aCc17>2V{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8L=HW G!1
} YR\faVk
} l K{hVqpt
} olB.*#gA
} o+iiSTJEe
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堆排序： ~Y[r`]X`"m
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package org.rut.util.algorithm.support; a@K%06A;'
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import org.rut.util.algorithm.SortUtil; 4d4ZT?V[
*}qWj_RT
/** sPpH*,(
* @author treeroot -a}Dp~j
* @since 2006-2-2 5+0gR &|j
* @version 1.0 Lz}OwKl
*/ 0@0w+&*"@
public class HeapSort implements SortUtil.Sort{ 4&lv6`G `
D(op)]8
/* (non-Javadoc) GRIti9GD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [T4J{y64Y
*/ _IHV7*u{;
public void sort(int[] data) { |)th1 UH
MaxHeap h=new MaxHeap(); h]&GLb&<?
h.init(data); hg]]Ok~cAs
for(int i=0;i h.remove(); 3PWL@>zi
System.arraycopy(h.queue,1,data,0,data.length); a#(?P.6
} 23eX;gL
m#Jmdb_
private static class MaxHeap{ |)DGkOtd
HXC ;Np
void init(int[] data){ #4NaL
this.queue=new int[data.length+1]; S"QWB`W2
for(int i=0;i queue[++size]=data; Pl06:g2I
fixUp(size); 1p3z1_wrs
} pZ{+c
} |-67\p]
<]t%8GB2V
private int size=0; QD&`^(X1p
u(.e8~s8
private int[] queue; B2vh-%63
z=\&i\>;Z+
public int get() { j?\Qh
return queue[1]; vkV0On
} uk:(pZ-uJ
2DDtu[}
public void remove() { nsC3
SortUtil.swap(queue,1,size--); Xf]d. :
fixDown(1); 8U"v6S~A%Q
} dh iuI|?@
file://fixdown E?f-wQF
private void fixDown(int k) { l}|%5.5-
int j; @+2=g WH
while ((j = k << 1) <= size) { !X#OOqPr=
if (j < size %26amp;%26amp; queue[j] j++; rl;~pO5R9
if (queue[k]>queue[j]) file://不用交换 yjX9oxhtL
break; K&]G3W%V
SortUtil.swap(queue,j,k); A2Ed0|By
k = j; z (wc0I
} x.6:<y
} ibk6|pp
private void fixUp(int k) { ifQ*,+@fxR
while (k > 1) { Wq&if_
int j = k >> 1; ;?iW%:_,
if (queue[j]>queue[k]) %3-y[f
break; ,AFu C<
SortUtil.swap(queue,j,k); lIS-4QX1
k = j; e{K 215
} -zgI_u9=EB
} 7t0=[i
bl;1i@Z*M
} Z]Cq3~l
'@KEi%-^>
} #&aqKVY
3z?> j]
SortUtil： B%b4v
u'DRN,h+
package org.rut.util.algorithm; E7UU
F^BS/Yag
import org.rut.util.algorithm.support.BubbleSort; Qbn"=n2
import org.rut.util.algorithm.support.HeapSort; J/aC}}5D
import org.rut.util.algorithm.support.ImprovedMergeSort; CYP q#rd
import org.rut.util.algorithm.support.ImprovedQuickSort; .@U@xRu7|
import org.rut.util.algorithm.support.InsertSort; ^"2J]&x`G
import org.rut.util.algorithm.support.MergeSort; Om\vMd@!
import org.rut.util.algorithm.support.QuickSort; *vxk@`K~
import org.rut.util.algorithm.support.SelectionSort; Hg izW
import org.rut.util.algorithm.support.ShellSort; zu{P#~21
,!y$qVg'\f
/** G4X|Bka
* @author treeroot b=NxUd O
* @since 2006-2-2 xsbE TP?
* @version 1.0 WPMSm<[
*/ )9`qG:b'
public class SortUtil { KL57#gV
public final static int INSERT = 1; h(_57O:
public final static int BUBBLE = 2; ;:g@zAV
public final static int SELECTION = 3; 'Aq{UGN
public final static int SHELL = 4; 06Sceq
public final static int QUICK = 5; v%z=ysA
public final static int IMPROVED_QUICK = 6; NP3y+s
public final static int MERGE = 7; [EXs
public final static int IMPROVED_MERGE = 8; [D4SW#
public final static int HEAP = 9; "$^ ~!1~
%_W)~Pv{+
public static void sort(int[] data) { ucW-I;"
sort(data, IMPROVED_QUICK); *fS"ym@
} 3$>1FoSk
private static String[] name={ 6Y?|w3f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fj3a.'
}; 0gr/<v
7*A],:-q
private static Sort[] impl=new Sort[]{ | rtD.,m
new InsertSort(), !ons]^km
new BubbleSort(), MaQqs=
new SelectionSort(), 9vc2VB$
new ShellSort(), 9F;>W ET
new QuickSort(), 6}Ci>_i4#
new ImprovedQuickSort(), 37.S\gO]
new MergeSort(), K;H&n1
new ImprovedMergeSort(), YfKdR"i+.
new HeapSort() WO>nIo5Y
}; @,my7?::oM
D'PI1 0t
public static String toString(int algorithm){ c]o'xd,T8\
return name[algorithm-1]; {]@= ijjf
} YZ8>OwQz2
0-Ku7<a
public static void sort(int[] data, int algorithm) { O;jrCB
impl[algorithm-1].sort(data); (vJNHY M
} /%1ON9o>
2-v%`fA
public static interface Sort { i3mcx)d@H
public void sort(int[] data); SRDp*
} p%=u#QNi
)}Kf=
public static void swap(int[] data, int i, int j) { #r\4sVg
int temp = data; .|fHy
data = data[j]; \V~eVf;~
data[j] = temp; Moza".fiN
} H40p86@M
} *P=VFP