[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; 2l#c?]TA
} QSxR@hC
int i1=l; $V0G[!4
int i2=mid+1; Q*J8`J:#^R
for(int cur=l;cur<=r;cur++){ PS=N]e7k'
if(i1==mid+1) `3CdW
data[cur]=temp[i2++]; dpPu&m+
else if(i2>r) T|o ]8z
data[cur]=temp[i1++]; }CCTz0[D"
else if(temp[i1] data[cur]=temp[i1++]; aGR!T{`
else jrl'?`O
data[cur]=temp[i2++]; BsJ d*-:X
} KDX1_r=Y
} Gz,?e]ZV
pp2,d`01[L
} 0S%xm'|N
%\|9_=9Wn
改进后的归并排序: 7^2
t6+c"=P#
package org.rut.util.algorithm.support; oE H""Bd
D\ ;(BB
import org.rut.util.algorithm.SortUtil; uSl&d
iiw\
/** h|T_ k
* @author treeroot ^]cl:m=*
* @since 2006-2-2 T{"[Ih3Mbl
* @version 1.0 U $2"ZyFii
*/ 5vmc'Om
public class ImprovedMergeSort implements SortUtil.Sort { L*QX21@wC
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private static final int THRESHOLD = 10; >]!8f?,
vR)f'+_Nz
/* 3bd(.he2u
* (non-Javadoc) jGSY$nt9
* ieL7jN,'m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]VCVV!G_=n
*/ T@4R|P&{)
public void sort(int[] data) { _&wrA3@/L
int[] temp=new int[data.length]; Z"pCDW)
mergeSort(data,temp,0,data.length-1); [B,w\PLub
} l+vD`aJ3
'e(]woe
private void mergeSort(int[] data, int[] temp, int l, int r) { "PD^]m
int i, j, k; kF@Z4MB}yr
int mid = (l + r) / 2; VL?sfG0
if (l == r) Mjon++>Z
return; wwuM!Z+
if ((mid - l) >= THRESHOLD) k Xg&}n7
mergeSort(data, temp, l, mid); Lhz*o6)
else sc0.!6^'V
insertSort(data, l, mid - l + 1); =.48^$LWx
if ((r - mid) > THRESHOLD) ;}dvc7
mergeSort(data, temp, mid + 1, r); x<'<E@jpU;
else ]J(BaX4
insertSort(data, mid + 1, r - mid); QhJuH_f 0
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for (i = l; i <= mid; i++) { J85S'cwZZ
temp = data; 0Xw$l3@N^
} P{K;vEp
for (j = 1; j <= r - mid; j++) { EEn8]qJC
temp[r - j + 1] = data[j + mid]; .}c&"L;W
} ;xl0J*r
int a = temp[l]; N*`qsv0
int b = temp[r]; {44#<A<
for (i = l, j = r, k = l; k <= r; k++) { )4e8LO
if (a < b) { Iysp)
data[k] = temp[i++]; qN"Q3mU^h*
a = temp; qI%X/'
} else { SYd6D@^2j
data[k] = temp[j--]; 0 L$[w
b = temp[j]; EvKzpxCh
} Q3I^(Ll"L
} mz|p=[lR|
} <5 }
2j;9USZ p
/** dLfB){>S
* @param data y}U}AUt
* @param l c[>xM3=e^q
* @param i [Qqomm.[\w
*/ AGGT] 58|
private void insertSort(int[] data, int start, int len) { CUN1.i<pk8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WS ^,@>A
} }n( ?|
} mIZ6[ ?
} )~0TGy|
} 0Lf4^9N
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堆排序： c;Gf$9?iC
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package org.rut.util.algorithm.support; ph$vP;}
kMx)G]
import org.rut.util.algorithm.SortUtil; ALQ-aXJ
[DZ|Ltv
/** cgi:"y F
* @author treeroot w{*PZb4
* @since 2006-2-2 bC/Ql
* @version 1.0 7$*X
*/ MD^,"!A
public class HeapSort implements SortUtil.Sort{ 2){O&8A
3 "iBcsLn
/* (non-Javadoc) a4[t3U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?t5<S]'r$
*/ ed2r<H$
public void sort(int[] data) { 4.p:$/GTS
MaxHeap h=new MaxHeap(); pm=m~
h.init(data); J&iSS9c
for(int i=0;i h.remove(); {;N2 &S o
System.arraycopy(h.queue,1,data,0,data.length); \(RD5@=!4#
} Eq%f`Qg+1E
d N$,AOT
private static class MaxHeap{ W4,'?o
<F8e?xy
void init(int[] data){ l5 ]
this.queue=new int[data.length+1]; TZ+ p6M8G
for(int i=0;i queue[++size]=data; s[sv4hq
fixUp(size); l -xc*lC
} aG83@ABx
} q" f65d4c
p_g`f9q6D
private int size=0; Scx!h.\5
|?#JCG
private int[] queue; OxYAM,F
-iS^VzI|I
public int get() { bD0l^?Hu!
return queue[1]; D*ZjoU
} bY2R/FNL=
K6t"98
public void remove() { p<=Lh47 =
SortUtil.swap(queue,1,size--); ":8\2Qp
fixDown(1); pa1<=w
} #|ts1lD#ah
file://fixdown y$\tqQ
private void fixDown(int k) { ^S3G%{"
int j; RARA_tii
while ((j = k << 1) <= size) { $Yt|XT+!&
if (j < size %26amp;%26amp; queue[j] j++; 5, ,~k=
if (queue[k]>queue[j]) file://不用交换 -R]0cefC<f
break; E<Zf!!3
SortUtil.swap(queue,j,k); J?w_DQa
k = j; vII{i
} LNWS
} -0d9,,c
private void fixUp(int k) { n2bhCd]j<b
while (k > 1) { 7h}gIm7e"
int j = k >> 1; Ze~P6
if (queue[j]>queue[k]) 2L~Vr4eHG
break; k_,7#:+
SortUtil.swap(queue,j,k); bO\++zOF
k = j; N!(mM;1X)
} miaH,hm
} 4{YA['
<=">2WP{
} uaF-3
N l@G\_
} |@X^_L.!
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SortUtil： o'#& =h$_
}QCnN2bV
package org.rut.util.algorithm; y''~j<'
Wlhh0uy
import org.rut.util.algorithm.support.BubbleSort; d/7R}n^
import org.rut.util.algorithm.support.HeapSort; +c))fPuV
import org.rut.util.algorithm.support.ImprovedMergeSort; OJcS%-~
import org.rut.util.algorithm.support.ImprovedQuickSort; -wXeue},>
import org.rut.util.algorithm.support.InsertSort; +& B?f
import org.rut.util.algorithm.support.MergeSort; $H@SXx
import org.rut.util.algorithm.support.QuickSort; i!%bz
import org.rut.util.algorithm.support.SelectionSort; l;iU9<~
import org.rut.util.algorithm.support.ShellSort; idYB.]Y(
rtuaU=U
/** ?XHQdN3e
* @author treeroot Fa%1]R
* @since 2006-2-2 VvyRZMR
* @version 1.0 cW:y^(Xii
*/ =\O#F88ui
public class SortUtil { fkZHy|m
public final static int INSERT = 1; 9-;-jnDy
public final static int BUBBLE = 2; <gF]9%2E
public final static int SELECTION = 3; l r&7 qu
public final static int SHELL = 4; <l<O2l
public final static int QUICK = 5; qdix@@
public final static int IMPROVED_QUICK = 6; `9^tuR,
public final static int MERGE = 7; L!cOg8Z
public final static int IMPROVED_MERGE = 8; ZM.'W}J{*
public final static int HEAP = 9; Pf[E..HF*d
M`cxxDj&j
public static void sort(int[] data) { +HS]kFH
sort(data, IMPROVED_QUICK); pp@ Owpb
} 5%I3eL%s
private static String[] name={ = QBvU)Ki
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TF8#I28AD
}; Gm|-[iUTG]
]>X_E%`G<b
private static Sort[] impl=new Sort[]{ (.4lsKN<
new InsertSort(), )=5&Q
new BubbleSort(), ' h7Faj
new SelectionSort(), RNk|h
new ShellSort(), : "85w#r
new QuickSort(), 8%9 C<+.R
new ImprovedQuickSort(), M6g8+sio
new MergeSort(), &&&-P\3
new ImprovedMergeSort(), (GC]=
new HeapSort() 7X>IS#W]
}; bIU.C|h@
pkn^K+<n,
public static String toString(int algorithm){ &D<R;>iI
return name[algorithm-1]; 8c9HJ9vk
} ?Lg(,-:
:F:1(FDP
public static void sort(int[] data, int algorithm) { a}UmD HS-
impl[algorithm-1].sort(data); 3}|[<^$
} P{o)Ir8Tt
3]*Kz*i
public static interface Sort { w/6X9d
public void sort(int[] data); &e^;;<*w
} L8`v
Xz^nm\
public static void swap(int[] data, int i, int j) { k'o[iKlu
int temp = data; MltO.K!
data = data[j]; ^%7(
data[j] = temp; IJ Jp5[w
} hY&Yp^"}]^
} `]KX`xGK