[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; nomu$|I
} uPM8GIvZX.
int i1=l; ^)(G(=-Rf
int i2=mid+1; D>psh-,1
for(int cur=l;cur<=r;cur++){ |^ 2rtI
if(i1==mid+1) S(@*3]!q
data[cur]=temp[i2++]; !pG+Ak?
else if(i2>r) /e;e\k_}'
data[cur]=temp[i1++]; ;a#}fX
else if(temp[i1] data[cur]=temp[i1++]; i528e{&
else ~)WfJ
data[cur]=temp[i2++]; !"Z."fm*
} xc:`}4
} CnM+HN30o
/zChdjz
} ~{52JeUcP
GapX$Jb,p
改进后的归并排序: ?,A}E|jZ
ph}wnIW]
package org.rut.util.algorithm.support; ;m2"cL>{l
n"K {uj))
import org.rut.util.algorithm.SortUtil; PV5TG39qQ
+ZD[[+
/** hY4)W
* @author treeroot H]T2$'U6
* @since 2006-2-2 4OqE.LFu
* @version 1.0 ~Q.8 U3"
*/ ovo?lE-a0
public class ImprovedMergeSort implements SortUtil.Sort { Bd N{[2
0+VncL)u
private static final int THRESHOLD = 10; /ze_{{o
Ba\wq:
/* '&_y*"/c
* (non-Javadoc) Vsm%h^]d
* N9>'/jgZX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) : .FfE
*/ $_I%1
public void sort(int[] data) { 2>_brz|7:|
int[] temp=new int[data.length]; p;c_<>ws-Y
mergeSort(data,temp,0,data.length-1); 7~%
} @+T{M:&l
qxecp2>U
private void mergeSort(int[] data, int[] temp, int l, int r) { a?xq*|?
int i, j, k; {Vt^Xc
int mid = (l + r) / 2; #1,>Qnl
if (l == r) ~(l2%(3G
return; O>o}<t7
if ((mid - l) >= THRESHOLD) ,h5-rw'
mergeSort(data, temp, l, mid); 21)-:rS
else ;#6<bV
insertSort(data, l, mid - l + 1); m_PrasZ>
if ((r - mid) > THRESHOLD) `|ck5DZT5L
mergeSort(data, temp, mid + 1, r); FRJ:ym=E
else %gne%9nn
insertSort(data, mid + 1, r - mid); C^8)IN=$
tl,x@['p`
for (i = l; i <= mid; i++) { J!TK*\a2
temp = data; bTo@gJkn
} 9B?t3:
for (j = 1; j <= r - mid; j++) { HLyFyv\
temp[r - j + 1] = data[j + mid]; YVg}q#
} 0u&?Zy9&
int a = temp[l]; .xc/2:m9
int b = temp[r]; MTFVnoZMQ_
for (i = l, j = r, k = l; k <= r; k++) { r* /XB0
if (a < b) { l)!woOt
data[k] = temp[i++]; f)s_e
a = temp; :x*|lz[
} else { +<9q]V
data[k] = temp[j--]; wor'=byh\
b = temp[j]; fE7a]REK
} w]5f3CIm
} ph&H*Mc
} 4f@\f7\
NE>JtTF<
/** y\f8Ird
* @param data G4J6
* @param l j}?ZsnqV
* @param i pil*/&pB
*/ 9{^B Tc
private void insertSort(int[] data, int start, int len) { Gp3t?7S{T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H7XxME
} 4[V6so0
} 7J!d3j2TR
} \z2hXT@D
} H1ui#5n2
'JKvy(n>
堆排序： JjO/u>A3;7
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package org.rut.util.algorithm.support; XJ1nhE
g:e8i~
import org.rut.util.algorithm.SortUtil; I:>d@e/;
=z/mI y<
/** /:L&uqA
* @author treeroot d?qO`- ~$
* @since 2006-2-2 w.F3o4YP
* @version 1.0 #FDu4xi
*/ {ZYCnS&?CL
public class HeapSort implements SortUtil.Sort{ B>nd9Z '
H&Lbdu~E
/* (non-Javadoc) ~~E=E;9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5lA 8e
*/ c94PWPU
public void sort(int[] data) { 21k-ob1Y
MaxHeap h=new MaxHeap(); s?I=}
h.init(data); W)P_t"'@L
for(int i=0;i h.remove(); 8o5^H>
System.arraycopy(h.queue,1,data,0,data.length); 0QSi\: 1f
} LZbHK.G=
R =c
private static class MaxHeap{ lVBy&f
w`Aw+[24
void init(int[] data){ Rl!WH%;c[X
this.queue=new int[data.length+1]; }z2-|"H
for(int i=0;i queue[++size]=data; pq5H{
fixUp(size); O6 J<Lqgh
} L ]'CA^N
} BTQC1;;N
AhZ
private int size=0; o;P;=<
PbH]K$mj{"
private int[] queue; O g~"+IGp
@8d})X33
public int get() { Gjh7cm>
return queue[1]; <NsT[r~C
} ]b$,.t5
bg. KkJMrR
public void remove() { P9!]<so
SortUtil.swap(queue,1,size--); 9r*T3=u.S
fixDown(1); [uV/ Ra*g
} 7ZnQ] ?
file://fixdown srA~gzF
private void fixDown(int k) { X~4:sJ\P=
int j; iR=aYT~
while ((j = k << 1) <= size) { _$lQK{@rY
if (j < size %26amp;%26amp; queue[j] j++; ^%@.Vvz<
if (queue[k]>queue[j]) file://不用交换 e-meUf9
break; "Y0[rSz,UW
SortUtil.swap(queue,j,k); / /rWc,c
k = j; ) O^08]Y g
} Kf5p*AI
} ]TOY_K8"z#
private void fixUp(int k) { ,DZLEsFM
while (k > 1) { 6&T1 ZY`
int j = k >> 1; %QbrVl+
if (queue[j]>queue[k]) <K'gvMG[
break; @vh>GiR){
SortUtil.swap(queue,j,k); I@+<[n2
k = j; ylJlICK
} tB7aHZ|
} xFnMXht
Z&!$G'X
} Ymvd=F
5+Ut]AL5
} V [>5
U7=Z.*/62
SortUtil： XrF9*>ti?
&YMj\KmlSg
package org.rut.util.algorithm; O}V2>W$
w{IqzmPiH
import org.rut.util.algorithm.support.BubbleSort; ha5\T'
import org.rut.util.algorithm.support.HeapSort; Bnv%W4
import org.rut.util.algorithm.support.ImprovedMergeSort; 8uiQm;W
import org.rut.util.algorithm.support.ImprovedQuickSort; z{x -Vfd
import org.rut.util.algorithm.support.InsertSort; |<$O5b'
import org.rut.util.algorithm.support.MergeSort; jL$X3QS:
import org.rut.util.algorithm.support.QuickSort; h,g~J-x`|
import org.rut.util.algorithm.support.SelectionSort; Ek0.r)Nw
import org.rut.util.algorithm.support.ShellSort; /[M~##%:
v\C+G[MV7
/** oJy/PR3
* @author treeroot @<L.#gtP
* @since 2006-2-2 2]wh1)
* @version 1.0 G y2XjO8b
*/ -6\9B>qa
public class SortUtil { v\vn}/>*d
public final static int INSERT = 1; COafVlJ,l
public final static int BUBBLE = 2; W0k_"uI
public final static int SELECTION = 3; B7;MY6h#
public final static int SHELL = 4; dXhV]xK
public final static int QUICK = 5; dWA7U6c<
public final static int IMPROVED_QUICK = 6; c9@*
public final static int MERGE = 7; z,WrLZC
public final static int IMPROVED_MERGE = 8; B!0[LlF+
public final static int HEAP = 9; ^.Q),{%Xo
uJizR F
public static void sort(int[] data) { y5I7pbe
sort(data, IMPROVED_QUICK); :gXj($
} Sk-Ti\
private static String[] name={ Uka4iya
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u CXd% CzE
}; ]@EjKgs
=0S7tNut
private static Sort[] impl=new Sort[]{ 9 +6"<r!
new InsertSort(), f 36rU
new BubbleSort(), 0#G"{M
new SelectionSort(), ^H'#*b0u
new ShellSort(), Oqyh{q%]
new QuickSort(), s*;~CH-[
new ImprovedQuickSort(), A<&9
new MergeSort(), [0$Y@ek[
new ImprovedMergeSort(), QnqX/vnR
new HeapSort() !**q20-aP
}; \hz)oC
eUl[gHP
public static String toString(int algorithm){ S}<(9@]z
return name[algorithm-1]; .s+e hZ
} E_? M&
"3K0 wR5
public static void sort(int[] data, int algorithm) { pT <H&
impl[algorithm-1].sort(data); V}("8L
} A/MOY@%G
`JC!uc
public static interface Sort { uo0(W3Q *
public void sort(int[] data); 6-oQs?
} JO$0Z
tC;D4i
public static void swap(int[] data, int i, int j) { ,?}TSJKC
int temp = data; ?h5Y^}8Qg
data = data[j]; @`T6\ 1
data[j] = temp; ,{%[/#~6
} o,d:{tt
} zw0p}