[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; r00waw>C\
} p~I+ZYWF'
int i1=l; Z{`;Ys:zk
int i2=mid+1; Mw@T!)(
for(int cur=l;cur<=r;cur++){ R-J\c+C>W
if(i1==mid+1) pt;E~_
data[cur]=temp[i2++]; VO>A+vx3M
else if(i2>r) UiA\J
data[cur]=temp[i1++]; ~%_$e/T
else if(temp[i1] data[cur]=temp[i1++]; h@FDP#H
else 6 k+FTDL
data[cur]=temp[i2++]; CJk$o K{Q
} H r?G_L
} .&.j?kb
E\#hcvP
} $x 6Rmd{
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改进后的归并排序: }6.R.*Imz
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package org.rut.util.algorithm.support; B;[{7J]
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import org.rut.util.algorithm.SortUtil; 0 V*Di2
~WU _u,:
/** oabc=N!7r
* @author treeroot {bL6%._C
* @since 2006-2-2 ,Cj1S7GFR
* @version 1.0 q5?g/-_0[
*/ tYiK#N7
public class ImprovedMergeSort implements SortUtil.Sort { MVz=:2)J2
MhNzmI&`
private static final int THRESHOLD = 10; ws Lg6
U.hV1
/* mJRvC%
* (non-Javadoc) <Bb$d@c
* y.2_5&e/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +:?-Xd:p
*/ 8I$B^,N
public void sort(int[] data) { @Z~lM5n$8
int[] temp=new int[data.length]; BKfcK>%g
mergeSort(data,temp,0,data.length-1); |E0>-\6
} !Sfy'v.
MPA<?
private void mergeSort(int[] data, int[] temp, int l, int r) { {&8-OoH ~
int i, j, k; _Xd,aLoo
int mid = (l + r) / 2; ]p:x,%nm
if (l == r) 6+BR5Nr
return; /J`8Gk59
if ((mid - l) >= THRESHOLD) 5#s?rA%u
mergeSort(data, temp, l, mid); YvE$fX=
else +I#4+0f
insertSort(data, l, mid - l + 1); : m$cnq~h
if ((r - mid) > THRESHOLD) k'}}eu/ q
mergeSort(data, temp, mid + 1, r); sXOGIv
else jFpXTy[>
insertSort(data, mid + 1, r - mid); 6UR.,*f=
{o< 4 ^
for (i = l; i <= mid; i++) { aM5zYj`pW
temp = data; +[8s9{1{C
} mb~w .~%
for (j = 1; j <= r - mid; j++) { vC[)/w
temp[r - j + 1] = data[j + mid]; #sdW3m_%
} FiJJe
int a = temp[l]; _,_>B8
int b = temp[r]; o0&jel1a
for (i = l, j = r, k = l; k <= r; k++) { "2(lgxhj
if (a < b) { ym:^Y-^iV
data[k] = temp[i++]; ?dlQE,hB$
a = temp; y562g`"U
} else { Bx0^?>
data[k] = temp[j--]; qyGVyi3
b = temp[j]; Kf2*|ZHj
} dQ@e+u5
} ~ z*
} >3s9vdUp4h
*5]fjh{
/** 1u75
* @param data ZN-J!e"`
* @param l +"6_rbeuO
* @param i V;mKJ.d${
*/ ;({&C34a
private void insertSort(int[] data, int start, int len) { *,{. oO9#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K2>(C$Z
} 1BwCJ7?8
} _C~e(/=z
} ,Y=r] fk
} KG6ki_
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堆排序： Ke,UwYG2~G
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package org.rut.util.algorithm.support; 8:0QIkqk
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import org.rut.util.algorithm.SortUtil; =_I2ek
%/b?T]{
/** frbKi _1
* @author treeroot hNmC(saMGm
* @since 2006-2-2 A U9Y0<
* @version 1.0 GLQ1rT
*/ JDfkm+}uY
public class HeapSort implements SortUtil.Sort{ ?Z {4iF
o$oW-U
/* (non-Javadoc) wX@&Qv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |`_qmk[:R
*/ ?Q[uIQ?dV
public void sort(int[] data) { //]g78]=O
MaxHeap h=new MaxHeap(); lHv;C*(_=
h.init(data); 8hba3L_Z
for(int i=0;i h.remove(); 4]A2Jl E
System.arraycopy(h.queue,1,data,0,data.length); |8PUmax
} /c'3I
wO&`3Q3~$
private static class MaxHeap{ _Sy-&}c+ +
@B %m,Mx
void init(int[] data){ m]} E0
this.queue=new int[data.length+1]; Or= [2@Wg
for(int i=0;i queue[++size]=data; =($RT
fixUp(size); @'j=oTT
} x$d3fsEE
} )n}Wb+2I
I>o+INb:
private int size=0; dawe!w!
I-oI,c%+
private int[] queue; >(S4h}^I
uQazUFw
public int get() { (f^WC,
return queue[1]; 2s>dlz
} f9u^/QVS&
/:d03N\9k
public void remove() { _}R?&yO
SortUtil.swap(queue,1,size--); U*`7
fixDown(1); B =@BYqiY
} LvgNdVJDP|
file://fixdown jnsV'@v8Nj
private void fixDown(int k) { #Mw|h^Wm
int j; \c3zK|^
while ((j = k << 1) <= size) { ^ }Rqe
if (j < size %26amp;%26amp; queue[j] j++; |E-/b6G
if (queue[k]>queue[j]) file://不用交换 }NW^?37
break; Hq[d!qc
SortUtil.swap(queue,j,k); )kR~|Yn<-
k = j; /KjRB_5~q}
} #-dfG.*
} JUXIE y^
private void fixUp(int k) { Q*}#?g
while (k > 1) { P1)f-:;
int j = k >> 1; EKoAIC*?p
if (queue[j]>queue[k]) ac"Pn? q
break; {.pR$]6B"+
SortUtil.swap(queue,j,k); pV{MW#e
k = j; 4wh_iO
} Jaz|b`KDj
} Wm$(b2t
:L#t?~
} j@1cllJkh
?rID fEvV
} *c4uCI:0t
gQ4Q h;
SortUtil： sc'QNhrW
*t J+!1
package org.rut.util.algorithm; Wc [@,
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import org.rut.util.algorithm.support.BubbleSort; Ac;rMwXk#
import org.rut.util.algorithm.support.HeapSort; ;> **+ezF
import org.rut.util.algorithm.support.ImprovedMergeSort; /B)ZB})z
import org.rut.util.algorithm.support.ImprovedQuickSort; H6(kxpOI\
import org.rut.util.algorithm.support.InsertSort; oVutHt
import org.rut.util.algorithm.support.MergeSort; 'b#RfF,7H}
import org.rut.util.algorithm.support.QuickSort; yE[ -@3v
import org.rut.util.algorithm.support.SelectionSort; ga&l.:lo
import org.rut.util.algorithm.support.ShellSort; wU,{5w
7_C;-
/** qYv/" 1
* @author treeroot *5Upb,**
* @since 2006-2-2 T.O^40y
* @version 1.0 ',j'Hf
*/ wr{03mQHxp
public class SortUtil { f>\OT
public final static int INSERT = 1; w='1uV<6
public final static int BUBBLE = 2; ktLXL;~X
public final static int SELECTION = 3; \~!9T5/*
public final static int SHELL = 4; Z*S 9pkWcF
public final static int QUICK = 5; e@'rY#:u
public final static int IMPROVED_QUICK = 6; }YJ(|z""
public final static int MERGE = 7; ?Q1(L$-=
public final static int IMPROVED_MERGE = 8; g.OBh_j-v
public final static int HEAP = 9; &EKP93
WF\ hXO
public static void sort(int[] data) { +shT}$cb1
sort(data, IMPROVED_QUICK); ;@p2s'(
} `3+yu' Q'
private static String[] name={ G0Zq:kJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #k2&2W=x
}; j~,7JJ (y
CqX2R:#
private static Sort[] impl=new Sort[]{ 7uG@hL36
new InsertSort(), _"n1"%Ns
new BubbleSort(), fTiqY72h
new SelectionSort(), 2GOQ|Z
new ShellSort(), &09z`*,
new QuickSort(), u4TU"r("A
new ImprovedQuickSort(), >!O3 jb k
new MergeSort(), Nf8."EDUW
new ImprovedMergeSort(), -5,QrMM<
new HeapSort() @w&VI6
}; wHm{4
LX),oR
public static String toString(int algorithm){ XH4!|wz
return name[algorithm-1]; `&$"oW{HW
} )1ia;6}
JwWW w1
public static void sort(int[] data, int algorithm) { *0]E4]ZO
impl[algorithm-1].sort(data); x&9}] E^<
} Qr]xj7\@i
Q4e*Z9YJ
public static interface Sort { Ug>yTc_(7
public void sort(int[] data); Z7RGOZQ}G
} `:cnu;
DpjiE/*
public static void swap(int[] data, int i, int j) { }[ LME Z
int temp = data; z-fP#.
data = data[j]; gQaBQq9
data[j] = temp; RM\it"g
} h(]aP<49L
} 'qcLK>E