[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; jeN_ sm81b
} ?CAP8_
int i1=l; Jh{(xGA
int i2=mid+1; ^TVica
for(int cur=l;cur<=r;cur++){ #E5Sc\,
if(i1==mid+1) 8'Xpx+v
data[cur]=temp[i2++]; & oZI.Qeo
else if(i2>r) 9Wb9g/L
data[cur]=temp[i1++]; , =IbZ
else if(temp[i1] data[cur]=temp[i1++]; ']u w,b
else *ls}r5k2Y
data[cur]=temp[i2++]; SgAY/#
} )6PZ.s/F6p
} bnWIB+%_
*oY59Yf
} QJTGeJ Y
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改进后的归并排序: bICi'`
wHWd~K_q
package org.rut.util.algorithm.support; 6JmS9ho
ORs<<H.d
import org.rut.util.algorithm.SortUtil; LV0g *ng
E$ q/4
/** G<4H~1?P
* @author treeroot r|fJ~0z
* @since 2006-2-2 A{: a kK
* @version 1.0 Z=z'j8z3
*/ |08tQ
public class ImprovedMergeSort implements SortUtil.Sort { ;s3"j~5m)
<#7}'@
private static final int THRESHOLD = 10; ~YlbS-
AVOqW0Z+y
/* 9TO
* (non-Javadoc) 2Q|Vg*x\U
* 3VCyq7B^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g4=}].
*/ 0jrcXN~
public void sort(int[] data) { #i7!
int[] temp=new int[data.length]; J*.Nf)i
mergeSort(data,temp,0,data.length-1); tU!"CX
} Dgc[WsCEW
i'L7t!f}o
private void mergeSort(int[] data, int[] temp, int l, int r) { M)Yu^
int i, j, k; 5L42'gJ
int mid = (l + r) / 2; W;,UhE
if (l == r) |m"2B]"@
return; 2xni! *T+
if ((mid - l) >= THRESHOLD) IA&((\YC
mergeSort(data, temp, l, mid); }{ pNasAU
else A*n'"+_
insertSort(data, l, mid - l + 1); TiCp2Rsz
if ((r - mid) > THRESHOLD) gA2Il8K
mergeSort(data, temp, mid + 1, r); .7g^w+W
else j Z3N+_J1
insertSort(data, mid + 1, r - mid); -J:](p
@H@&B`Kd
for (i = l; i <= mid; i++) { ?fnJ`^|-r
temp = data; k>K23(X
} g/lv>*+gS
for (j = 1; j <= r - mid; j++) { ~fAdOh
temp[r - j + 1] = data[j + mid]; ^^}
} Z2PLm0%:
int a = temp[l]; d{9rEB?
int b = temp[r]; PP[{c
for (i = l, j = r, k = l; k <= r; k++) { "h_n/}r=
if (a < b) { s+yBxgQ/
data[k] = temp[i++]; A0oC*/
a = temp; 6}L[7~1
} else { W7l/{a @
data[k] = temp[j--]; *VIM!/YW
b = temp[j]; .<u<!fL2
} _66zXfM<
} hs2f3;)
} >pv~$
+{]/ b%P
/** HzQ6KYAMq
* @param data @-qxNw
* @param l &hB~Z(zS!
* @param i r7C m
*/ yHCQY4/
private void insertSort(int[] data, int start, int len) { |I^\|5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h[C!cX
} yf3%g\k
} {Ylj]
} 9H1R0iWW
} \r324Bw>2
q}ZZqYk
堆排序： "o<:[c9/
9V.)=*0hp
package org.rut.util.algorithm.support; k#JFDw\
I?4J69'
import org.rut.util.algorithm.SortUtil; V F6OC4 K
7T_g?!sdMh
/** @s/;y VVq
* @author treeroot x\3 ` W
* @since 2006-2-2 O*H:CW
* @version 1.0 MZ=U} &F
*/ }UXj|SY
public class HeapSort implements SortUtil.Sort{ z\_q`43U7
qq[2h~6P]
/* (non-Javadoc) }!Qo wG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .3{S6#
*/ d+fmVM?p
public void sort(int[] data) { -R~;E[ {%
MaxHeap h=new MaxHeap(); O7s0M?4
h.init(data); #T#&qo#
for(int i=0;i h.remove(); z.e%AcX
System.arraycopy(h.queue,1,data,0,data.length); 1 YMaUyL 1
} &^ =t%A%#
0AJ6g@t[
private static class MaxHeap{ asQ pVP
z ]o&^Q
void init(int[] data){ TkWS-=lNH0
this.queue=new int[data.length+1]; K&BlWXT
for(int i=0;i queue[++size]=data; p|(910OEQ
fixUp(size); E2X KhW
} w][ ;
} _?1<
!ye%A&
private int size=0; VG&|fekF
%dw-}1X
private int[] queue; >^|\wy
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public int get() { 0m7J'gm{
return queue[1]; t Z\
} 9@QP?=\Y
L.U [eH
public void remove() { 2?QIK3"v
SortUtil.swap(queue,1,size--); #Sb1oLC
fixDown(1); JP!$uK{u
} 7<IrN\@U
file://fixdown bxkp9o
private void fixDown(int k) { FxM`$n~K
int j; HY5g>wv@
while ((j = k << 1) <= size) { "uTzmm$
if (j < size %26amp;%26amp; queue[j] j++; .}SW`RPk
if (queue[k]>queue[j]) file://不用交换 fhMtnh:
break; Yx(?KN7V?
SortUtil.swap(queue,j,k); YOGwQ
k = j; K+ufcct
} Y<w2_+(
} Ulj2Py}
private void fixUp(int k) { i&mu=J[
while (k > 1) { Z=825[p
int j = k >> 1; VG2TiR1
if (queue[j]>queue[k]) D?@330'P9C
break; KNIYar*3
SortUtil.swap(queue,j,k); vq(@B
k = j; J24UUZ9&$
} H&mw!=FV0
} ReZ|q5*
"E/F{6NH
} wF?THkdFo
TL]2{rf~
} 5y}}?6n+
.[= 0(NO
SortUtil： -M%n<,XN0
Pk~P
package org.rut.util.algorithm; qZKU=HM
t+m$lqm
import org.rut.util.algorithm.support.BubbleSort; $Jb+}mlT
import org.rut.util.algorithm.support.HeapSort; W zy8
import org.rut.util.algorithm.support.ImprovedMergeSort; NkNw9?:#4
import org.rut.util.algorithm.support.ImprovedQuickSort; bi#o1jR
import org.rut.util.algorithm.support.InsertSort; o2a`4K
import org.rut.util.algorithm.support.MergeSort; Kk9 JZ[nT'
import org.rut.util.algorithm.support.QuickSort; 1ReO.Dd`R
import org.rut.util.algorithm.support.SelectionSort; 9WtTUk
import org.rut.util.algorithm.support.ShellSort; OR1XQij
+P}'2tE~'
/** hkHMBsNi
* @author treeroot `hM]5;0
* @since 2006-2-2 z)43+8;
* @version 1.0 -a&wOn-W
*/ <gf:QX!
public class SortUtil { ?v8RY,Q30
public final static int INSERT = 1; ~}83\LI}
public final static int BUBBLE = 2; 9zi/z_G
public final static int SELECTION = 3; H'?Bx>X
public final static int SHELL = 4; -("79v>#
public final static int QUICK = 5; Pa0tf:
public final static int IMPROVED_QUICK = 6; jY87NHg
public final static int MERGE = 7; ;`X-.45
public final static int IMPROVED_MERGE = 8; kl3#&>e
public final static int HEAP = 9; 5T8X2fS:
1tQZyHc42;
public static void sort(int[] data) { #3kR}Amow
sort(data, IMPROVED_QUICK); 2}~1poyi>
} |=jgrm1yj
private static String[] name={ p_B,7@Jl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gOgG23 x
}; Qi6vP&
Zm&Zz^s
private static Sort[] impl=new Sort[]{ sl |S9Ix
new InsertSort(), o)"}DeV$&
new BubbleSort(), 84)S0Y8w
new SelectionSort(), j(/"}d3osm
new ShellSort(), +;FF0_
new QuickSort(), "Q2[A]4E
new ImprovedQuickSort(), 6$fC R
new MergeSort(), <mrLld#_:C
new ImprovedMergeSort(), 9DKmXL
new HeapSort() $AG.<
}; L_)?5IOJ$
5!tmG- 'b
public static String toString(int algorithm){ N4)&K[
return name[algorithm-1]; YA{Kgc^
} ={={W
vQu) uml
public static void sort(int[] data, int algorithm) { tQo"$ JN}
impl[algorithm-1].sort(data); .7~Kfm@2
} U:_T9!fG
9dqD(S#C;"
public static interface Sort { 2=F_<Jh|+
public void sort(int[] data); ~NU~jmT2
} q_cqjly<
PJO;[: .I
public static void swap(int[] data, int i, int j) { 0S/&^
int temp = data; OSfwA&
data = data[j]; c7wza/r>
data[j] = temp; sDJ5'ul
} ~g1@-)zYxK
} /xrt,M@