[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; C|ZPnm>f30
} ceUe*}\cr
int i1=l; B=0^Rysg
int i2=mid+1; Ge?Wmq>
for(int cur=l;cur<=r;cur++){ 4l 67B]o
if(i1==mid+1) b,'O|s]"Sc
data[cur]=temp[i2++]; 01A{\O1$j
else if(i2>r) ` -_!%m/
data[cur]=temp[i1++]; >jt2vU@t.
else if(temp[i1] data[cur]=temp[i1++]; SwOW%o
else k8D_
data[cur]=temp[i2++]; K1@Pt}
} /DAR'9@h
} ,@ '^3u
G*9(O:
} 2+9VDf2
jR%*,IeB
改进后的归并排序: gG?@_ie
7P1Pk?pxy
package org.rut.util.algorithm.support; 4)gG_k
x7S\-<8
import org.rut.util.algorithm.SortUtil; !Gmnck&+
V,-we|"
/** x3y+=aj
* @author treeroot 3^/w`(-{@
* @since 2006-2-2 i(4<MB1a
* @version 1.0 &J3QO%
*/ 3RaduN]
public class ImprovedMergeSort implements SortUtil.Sort { AR[m+E
u`'"=Y_E
private static final int THRESHOLD = 10; E0ED[d,
^8 VW$}
/* WE\TUENac(
* (non-Javadoc) I[?\Or
* nXT`7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yXU.PSG*
*/ nQc,^A)I
public void sort(int[] data) { +4 k=Y
int[] temp=new int[data.length]; 'D21A8*N
mergeSort(data,temp,0,data.length-1); {;{U@Z
} z$Jm1l
$yx\2
private void mergeSort(int[] data, int[] temp, int l, int r) { 6ld4'oM
int i, j, k; ">[#Ops-;$
int mid = (l + r) / 2; *D|a`R!Y
if (l == r) F{x+1hct0
return; sa'1hX^@
if ((mid - l) >= THRESHOLD) /"X_{3dq?
mergeSort(data, temp, l, mid); x0# Bc7y
else 0=>$J WF
insertSort(data, l, mid - l + 1); FI^Wh7J
if ((r - mid) > THRESHOLD) FOF@@C~aH
mergeSort(data, temp, mid + 1, r); }y6|H,t9
else Y D<3#Dr]
insertSort(data, mid + 1, r - mid); *^-AOSVt,
a&'9[9E1
for (i = l; i <= mid; i++) { |.)LZP,
temp = data; :qE.(k1@5
} z|>TkCW6
for (j = 1; j <= r - mid; j++) { 9'*7 (j;
temp[r - j + 1] = data[j + mid]; >M#@vIo?<6
} >/n];fl>8
int a = temp[l]; 8"&!3_
int b = temp[r]; d27q,2f!
for (i = l, j = r, k = l; k <= r; k++) { nI3p`N8j*
if (a < b) { *'?ZG/ (
data[k] = temp[i++]; mz0{eO
a = temp; f\ P0%
} else { k{2Gq1S{
data[k] = temp[j--]; 33~MP;
b = temp[j]; ~:Rbd9IB
} 0z/*JVka
} TnQ>v{Rx
} P&Keslk
Ll|-CY $
/** .?u<|4jE6
* @param data iYr)Ao5X
* @param l > 'R{,1# U
* @param i 7n5gXiI"
*/ 9G[ DuYJI
private void insertSort(int[] data, int start, int len) { h~#iGs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #&.Znk:@.f
} toA}0MI(:
} hNXZL>6
} *J4!+GD
} KtaoOe
af|h4.A
堆排序： FGn"j@m0
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package org.rut.util.algorithm.support; ^Q#_
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import org.rut.util.algorithm.SortUtil; ^0zfQu+!
5'set?
/** |&4A"2QN
* @author treeroot 7L #)yY
* @since 2006-2-2 ^=x/:0
* @version 1.0 ;n't:yQW
*/ f9#zV2ke]
public class HeapSort implements SortUtil.Sort{ ~lV#- m*
b|_e):V|
/* (non-Javadoc) M+:5gMB'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ddgDq0N1j
*/ !SK`!/7c?
public void sort(int[] data) { X2V+cre
MaxHeap h=new MaxHeap(); ;y(;7n_ a
h.init(data); 9JdJn>
for(int i=0;i h.remove(); k[8F: T-
System.arraycopy(h.queue,1,data,0,data.length); {H/%2
} I7_8oq\3D
k<1i.rh
private static class MaxHeap{ 2{j$1EdI@-
L]MWdD
void init(int[] data){ K^!#;,0
this.queue=new int[data.length+1]; $]LS!@ Rm
for(int i=0;i queue[++size]=data; V< F&\
fixUp(size); I3>8B
} ;?{^LiD+F
} +2{ f>KZ
rfonM~3?'
private int size=0; f:M^q ;
, >WH)+a
private int[] queue; LZ)g&A(j?
d*tWFr|J-
public int get() { t0f7dU3e;L
return queue[1]; n1;a~0P
} T8m]f<
d*|RFU
public void remove() { ,Mw93Kp Va
SortUtil.swap(queue,1,size--); WdOxwsq"
fixDown(1); (RI)<zaK ;
} %ap]\o$^4
file://fixdown NlF*/Rs
private void fixDown(int k) { 79 4UY
int j; K1X-<5]{
while ((j = k << 1) <= size) { Y-})/zFc
if (j < size %26amp;%26amp; queue[j] j++; X QLP|v;"
if (queue[k]>queue[j]) file://不用交换 8`L]<Dm
break; %1TKgNf
SortUtil.swap(queue,j,k); 3m&r?xZs
k = j; Ar\fA)UQ`
} !y$##PZ
} oU)(/
private void fixUp(int k) { K\ Wzh;
while (k > 1) { g#i~^4-1
int j = k >> 1; 3chx4
if (queue[j]>queue[k]) WzFXF{(
break; A!GvfmzqIn
SortUtil.swap(queue,j,k); CE M4E
k = j; W^09tx/I
} 07SW$INb
} ga|<S@u?}
4Yvz-aSyO
} c9c]1XJ
#jBmWaP.
} ?8$`GyjS
3~fi#{
SortUtil： :JSxsA6k
3F"vK
package org.rut.util.algorithm; ;q'-<O
D,=~7/g
import org.rut.util.algorithm.support.BubbleSort; 8\;, d
import org.rut.util.algorithm.support.HeapSort; / ^)3V}
import org.rut.util.algorithm.support.ImprovedMergeSort; !r.-7hR$
import org.rut.util.algorithm.support.ImprovedQuickSort; D'[:35z
import org.rut.util.algorithm.support.InsertSort; wDi/oH/H
import org.rut.util.algorithm.support.MergeSort; vKnZ==B
import org.rut.util.algorithm.support.QuickSort; *JImP9SE
import org.rut.util.algorithm.support.SelectionSort; mD> J,E
import org.rut.util.algorithm.support.ShellSort; "tl{HM5u
JjZB!Lg=
/** Otu?J_d3
* @author treeroot |};d:LwX
* @since 2006-2-2 #qVvh3#g
* @version 1.0 ]?_~QE`
*/ 1VYH:uGuAU
public class SortUtil { $MvKwQ/
public final static int INSERT = 1; D0 k ,8|
public final static int BUBBLE = 2; kj2qX9Ms
public final static int SELECTION = 3; #rW-jW=A
public final static int SHELL = 4; \V'fB5
public final static int QUICK = 5; VEa"^{,w
public final static int IMPROVED_QUICK = 6; :C^{Lc
public final static int MERGE = 7; [BdRx`
public final static int IMPROVED_MERGE = 8; ,(oolx"Xa
public final static int HEAP = 9; [&~x5l 8\C
7}qxWz
public static void sort(int[] data) { pGU.+[|(
sort(data, IMPROVED_QUICK); UQkd$w<
} r1q'+i
private static String[] name={ =~D[M)UO|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A ___| #R
}; i<m) s$u
dSjO12b
private static Sort[] impl=new Sort[]{ 7_36xpw
new InsertSort(), gHh(QRA
new BubbleSort(), U$DZht4>u
new SelectionSort(), Wk^{Tn/]
new ShellSort(), B{0]v-w
new QuickSort(), FnVW%fh
new ImprovedQuickSort(), B!<B7Q
new MergeSort(), |{|B70v3Co
new ImprovedMergeSort(), R7b-/ !L
new HeapSort() OE[7fDe'
}; 5X3JQ"z
tHaHBx1P
public static String toString(int algorithm){ 6|Dtx5 "r
return name[algorithm-1]; [ {"x{;
} R%LFFMVn
&b~X&{3,
public static void sort(int[] data, int algorithm) { cb'Ya_
impl[algorithm-1].sort(data); Hwd^C2v
} VO1
}x$@j
public static interface Sort { dR i6
public void sort(int[] data); xxzUey
} f }r \
2ia&c@P-
public static void swap(int[] data, int i, int j) { Q2oo\
int temp = data; 8MW-JZ
data = data[j]; 5o{U$
data[j] = temp; 4T52vM
} )M.g<[=^
} q%bFR[p<*