[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; +gl\l?>sr
} h:Pfiw]
int i1=l; *>m[ZJd%=
int i2=mid+1; h+km?j
for(int cur=l;cur<=r;cur++){ +Mj6.X
if(i1==mid+1) %i9S"
data[cur]=temp[i2++]; o/AG9|()4
else if(i2>r) x@#>l8k?
data[cur]=temp[i1++]; u>>|ZPe
else if(temp[i1] data[cur]=temp[i1++]; a%#UF@I
else O8;/oL4 U
data[cur]=temp[i2++]; x^s,<G
} !Dd'*ee-;
} jcCAXk055
( 5LCy?-6
} C[FHqo9M?H
%.bDK}
改进后的归并排序: C4m+Ta%
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package org.rut.util.algorithm.support; 6wlLE5
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import org.rut.util.algorithm.SortUtil; Dk `&tr
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/** Z`TfS+O6
* @author treeroot %&L13:
* @since 2006-2-2 #|9W9\f,
* @version 1.0 ZU 3Psj
*/ 3kxo1eb
public class ImprovedMergeSort implements SortUtil.Sort { x`6MAZ
l b(
private static final int THRESHOLD = 10; n Bm ]?
>LBA0ynh {
/* LL<xygd
* (non-Javadoc) {!Qu(%
* x%dny]O1;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w=GMQ8
*/ s^u Y
public void sort(int[] data) { /k'7j*t Z
int[] temp=new int[data.length]; 7xnj\9$m
mergeSort(data,temp,0,data.length-1); $>)0t@[f
} 9=j9vBV
5kHaZ Q
private void mergeSort(int[] data, int[] temp, int l, int r) { xs= ~N
int i, j, k; \HGf!zZ
int mid = (l + r) / 2; Lc!2'Do;
if (l == r) tpWGmjfo>
return; r;Sk[Y5#
if ((mid - l) >= THRESHOLD) OnTe_JML
mergeSort(data, temp, l, mid); }40T'y
else ,`t+X=#
insertSort(data, l, mid - l + 1); 5FOMh"!z\
if ((r - mid) > THRESHOLD) bq/Aopfr
mergeSort(data, temp, mid + 1, r); 3aW<FSgP
else FGDVBUY@
insertSort(data, mid + 1, r - mid); =WTSaC
!q\8`ss
for (i = l; i <= mid; i++) { ]dUG=dWO
temp = data; ACyK#5E
} fo ~uI(rk
for (j = 1; j <= r - mid; j++) { C|ZPnm>f30
temp[r - j + 1] = data[j + mid]; 33oW3vS
} 5/"$_7"{a
int a = temp[l]; -8l<5g7
int b = temp[r]; $d*9]M4
for (i = l, j = r, k = l; k <= r; k++) { vT?^#
if (a < b) { <Kt_ oxK,
data[k] = temp[i++]; GD4S/fn3
a = temp; 9@|52dz%
} else { .!3e$mhV
data[k] = temp[j--]; ?Bf>G]zx
b = temp[j]; vhBW1/w&F
} DhE-g<
} n\+c3
} B%tF|KKj
=v:?rY}
/** 4\n ~
* @param data 0GUJc}fgvN
* @param l _/1/{
* @param i Fx^wV^q3
*/ 9L>?N:%5
private void insertSort(int[] data, int start, int len) { M`Q$-#E:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |0[Buh[_:c
} %0GwO%h},
} iwF_'I$#N
} x0# Bc7y
} BgXZr,?
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堆排序： fOi Rstci
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package org.rut.util.algorithm.support; c5^HGIe1
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import org.rut.util.algorithm.SortUtil; h`6 (Oo|
T?RY~GA
/** b<tV>d"Fv
* @author treeroot Kg6J:HD49
* @since 2006-2-2 BHr,jC
* @version 1.0 xeF>"6\
*/ `PARZ|
public class HeapSort implements SortUtil.Sort{ Pxl,"
4v_Ac;2m&
/* (non-Javadoc) {.LJ(|(Mz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cM%?Ot,mK"
*/ _%CM<z e
public void sort(int[] data) { 4 {M
MaxHeap h=new MaxHeap(); JRB6T_U
h.init(data); DWU=qD+
for(int i=0;i h.remove(); /bykIUTKI
System.arraycopy(h.queue,1,data,0,data.length); $+80V{J#
} ! yJ0Am>
q|ce7HnK
private static class MaxHeap{ z\eQB%aM
i"V.$|,
void init(int[] data){ h3 HUdu
this.queue=new int[data.length+1]; uUjjAGZ
for(int i=0;i queue[++size]=data; OkC.e')Vx
fixUp(size); O\Huj=
} ;Ci:d*
} 43k'96[2d
Nk@-yZ@,8
private int size=0; !\#Wq{p>W*
ku,{NY f^Y
private int[] queue; R([zlw~B5
brTNwRze
public int get() { ~B[e*|d
return queue[1]; f:M^q ;
} .'=S1|_(
|-ZML~2S=h
public void remove() { h2'6W)
SortUtil.swap(queue,1,size--); +Kgl/Wg%
fixDown(1); Vja 4WK*
} ] !*K|?VL
file://fixdown z*T41;b
private void fixDown(int k) { f2c<-}wR
int j; qoZi1,i'
while ((j = k << 1) <= size) { 2Rw<0.i|
if (j < size %26amp;%26amp; queue[j] j++; B!mHO*g
if (queue[k]>queue[j]) file://不用交换 HsYzIQLL
break; BPj?l
SortUtil.swap(queue,j,k); 7KiraKb|
k = j; ; s(bd#Q
} (87wWhH
} IiniaVuQ
private void fixUp(int k) { s 4rva G@a
while (k > 1) { ;#zteqn
int j = k >> 1; W!HjO;
if (queue[j]>queue[k]) Yp(0XP5o
break; 2@bOy~$A
SortUtil.swap(queue,j,k); ;uAh)|;S#
k = j; }eSy]r[J
} #8XmOJ"W3k
} UA'bE~i
:g$"Xc8Zn
} *JImP9SE
`ZL^+h<b>M
} l'm|**
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SortUtil： 9Pg6,[*u
.pZYPKMaE
package org.rut.util.algorithm; LS*L XC
[<i3l'V/[
import org.rut.util.algorithm.support.BubbleSort; #rW-jW=A
import org.rut.util.algorithm.support.HeapSort; &p#PYs|H
import org.rut.util.algorithm.support.ImprovedMergeSort; &(<>} r
import org.rut.util.algorithm.support.ImprovedQuickSort; Wj3i*x$
import org.rut.util.algorithm.support.InsertSort; *b~8`Opa`
import org.rut.util.algorithm.support.MergeSort; pGU.+[|(
import org.rut.util.algorithm.support.QuickSort; )}$rgYKJ
import org.rut.util.algorithm.support.SelectionSort; A ___| #R
import org.rut.util.algorithm.support.ShellSort; IJ+}
cL .z{
/** r=.@APZB
* @author treeroot >4bw4 Z1
* @since 2006-2-2 /Q9Cvj)"
* @version 1.0 u0)O Fz
*/ O*+HK1q7
public class SortUtil { `dF~'
public final static int INSERT = 1; uUS~"\`fk
public final static int BUBBLE = 2; >l-u{([B
public final static int SELECTION = 3; A/9<} m
public final static int SHELL = 4; Xqe Qj}2kA
public final static int QUICK = 5; }x$@j
public final static int IMPROVED_QUICK = 6; ox<6qW
public final static int MERGE = 7; z( ^?xv
public final static int IMPROVED_MERGE = 8; I`xC0ZUKj
public final static int HEAP = 9; mGg/F&G9
dVq9'{[3
public static void sort(int[] data) { ~ecN4Oo4q;
sort(data, IMPROVED_QUICK); *:\[;69[
} XRM/d5
private static String[] name={ >mCH!ey
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HQF@@
}; fb0)("_V
<Ed;tq
private static Sort[] impl=new Sort[]{ GLub5GrxR
new InsertSort(), N:'GNMu
new BubbleSort(), i.K!;E>
new SelectionSort(), 3P75:v
new ShellSort(), G]xYQ]
new QuickSort(), e|SNb*_
new ImprovedQuickSort(), t?^!OJ:L
new MergeSort(), Q<szH1-
new ImprovedMergeSort(), hX,RuI
new HeapSort() TUGD!b{
}; ]ZR` 6|"VO
4uE)*1
public static String toString(int algorithm){ Y1AZ%{^0a
return name[algorithm-1]; v}5YUM0H`
} g>7i2
@D["#pe,}
public static void sort(int[] data, int algorithm) { rkh%[o9"/
impl[algorithm-1].sort(data); G{|"WaKW
} S+Ia2O)BA
O,+9r_Gh
public static interface Sort { g;q.vHvsc"
public void sort(int[] data); DIP%*b#l$\
} um<$L
[#X}(
public static void swap(int[] data, int i, int j) { U7fNA7#x"
int temp = data; eC 2~&:$L
data = data[j]; -d2)
data[j] = temp; A#Ga!a
} 3ohHBo
} SY.koW