[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; E/L?D
} {HRxyAI!
int i1=l; /m{?o
int i2=mid+1; '/yx_RK2?
for(int cur=l;cur<=r;cur++){ ^?^|Y?f2P?
if(i1==mid+1) ;5oH6{7_Z
data[cur]=temp[i2++]; WJFTy+bD
else if(i2>r) t6L^ #\'
data[cur]=temp[i1++]; Dpp52UnTE
else if(temp[i1] data[cur]=temp[i1++]; aIt 0;D
else MlC-Aad(
data[cur]=temp[i2++]; l&^[cR
} /=Uv
} 7dg 5HH
ry'^1~,
} @qhg[= @
:jKXKY+T
改进后的归并排序: m1$P3tZPn
D16;6K'{
package org.rut.util.algorithm.support; u,SX`6%
O*n%2Mam
import org.rut.util.algorithm.SortUtil; \q`+
%{VI-CQ
/** M"$RtS|h
* @author treeroot gmAKW4(
* @since 2006-2-2 7E6?)bgh
* @version 1.0 _467~5JkU
*/ QsF<=b~
public class ImprovedMergeSort implements SortUtil.Sort { W4rw;(\
Z%n.:I<%ZV
private static final int THRESHOLD = 10; \7tvNa,C
MVL }[J
/* BLH3$*,H
* (non-Javadoc) \-iUuHP
* #/v_h6$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w>q_8V_K
*/ =cKk3kJC
public void sort(int[] data) { {)[g
int[] temp=new int[data.length]; zt?wn*_
mergeSort(data,temp,0,data.length-1); 0JRBNh
} ~V- o{IA
Z6AU%3]
private void mergeSort(int[] data, int[] temp, int l, int r) { [^=8k2
int i, j, k; +~k,4
int mid = (l + r) / 2; +~{nU'
if (l == r) E|uXi)!.x
return; nMoF;AdKm
if ((mid - l) >= THRESHOLD) F"#*8P
mergeSort(data, temp, l, mid); 1'pQ,
else z}N^`_ *
insertSort(data, l, mid - l + 1); s ;Nu2aOp7
if ((r - mid) > THRESHOLD) cCKda3v!O
mergeSort(data, temp, mid + 1, r); `/Jr8J_
else &>4$ [m>n
insertSort(data, mid + 1, r - mid); g\nL n#
GeTCN
for (i = l; i <= mid; i++) { jtpNo~O
temp = data; IX3yNTW"L
} Z:gsguX
for (j = 1; j <= r - mid; j++) { 4qR Q,g{$T
temp[r - j + 1] = data[j + mid]; K{h]./%
} Jpnp'
int a = temp[l]; pnb$lpxt
int b = temp[r]; g8@HAV^H
for (i = l, j = r, k = l; k <= r; k++) { {"(|oIo{
if (a < b) { a#**96Av
data[k] = temp[i++]; ",GC\#^v
a = temp; >Nqkz?67
} else { 8k% :w0H
data[k] = temp[j--]; |8+rUFkU8
b = temp[j]; jo:p*Q"F
} mM~Q!`Nf.
} 0d)n}fm
} UM^hF%
&G,v*5N8$K
/** ViONG]F
* @param data dQo$^?
* @param l [vJosbU;
* @param i uB!P>v6
*/ ~t$VzL1
private void insertSort(int[] data, int start, int len) { EE{%hGb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $>`8'I
} t/c^hTT
} wOSNlbQ5jl
} @g?z>n n
} !2,.C+,
`Q[$R&\
堆排序： EH%j$=@X
N* QI>kzU
package org.rut.util.algorithm.support; {<Zqw]
z}|'&O*.F
import org.rut.util.algorithm.SortUtil; v7RDoO]I
svII =JB
/** #6nA^K}
* @author treeroot Z r*ytbt
* @since 2006-2-2 r4'Pf|`u
* @version 1.0 Z!6G(zz:>
*/ QX/`s3N
public class HeapSort implements SortUtil.Sort{ VzNH%
o qTh )
/* (non-Javadoc) -A~<IyPt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p^3d1H3
*/ P=GM7
public void sort(int[] data) { 36z{TWF
MaxHeap h=new MaxHeap(); ~M=`f{-$K
h.init(data); n~)%ou
for(int i=0;i h.remove(); #=c%:{O{4R
System.arraycopy(h.queue,1,data,0,data.length); w\a#Bfcv
} R8]bi|e)
e78}
private static class MaxHeap{ :JmNy<
s4\2lBU?
void init(int[] data){ QS_xOQ '
this.queue=new int[data.length+1]; [ CY=
for(int i=0;i queue[++size]=data; USY^ [@o[f
fixUp(size); :8FH{sqR
} -rBj-4|"
} Tbw8#[6AX
y+_U6rv[
private int size=0; z'o+3zq^
s5 BV8 M
private int[] queue; H}/1/5L
`CBTZG09
public int get() { GOjri
return queue[1]; 78kk"9h'
} yWy9IWI["
;3_'{
public void remove() { Zv_<*uzKZ
SortUtil.swap(queue,1,size--); rx<fjA%
fixDown(1); 4 0eNgm^
} ;NEHbLH#F
file://fixdown B7 T+a
private void fixDown(int k) { YI/vt2
int j; _~r>C
while ((j = k << 1) <= size) { ay2.CBF
if (j < size %26amp;%26amp; queue[j] j++; :v+39
if (queue[k]>queue[j]) file://不用交换 H"sey +-
break; #F kdcY
SortUtil.swap(queue,j,k); EJZ2V>\_-0
k = j; 59|Tmf(dS;
} fa)G$Q
} b=sc2)3?
private void fixUp(int k) { iqpy5
while (k > 1) { Xv6s,<#\
int j = k >> 1; 1*s Lj#
if (queue[j]>queue[k]) BX?Si1c
break; |o`TRqs
SortUtil.swap(queue,j,k); *ZRQ4i[+
k = j; #qzozQ4
} D`+'#%%x
} 7@:uVowQ
%NKf@If)
} -YYQnN
>R6Me*VR
} z}Q54,9m
\ /o`CV{O
SortUtil： v vFX\j3
[/I4Pe1Yj%
package org.rut.util.algorithm; h_J'dJS
tjGQ0-Lo
import org.rut.util.algorithm.support.BubbleSort; 3AWg43L7
import org.rut.util.algorithm.support.HeapSort; 1 #_R`(C{
import org.rut.util.algorithm.support.ImprovedMergeSort; 9R!.U\sq
import org.rut.util.algorithm.support.ImprovedQuickSort; NcdOzx>
import org.rut.util.algorithm.support.InsertSort; jGId)f!)
import org.rut.util.algorithm.support.MergeSort; Rgg(rF=K6
import org.rut.util.algorithm.support.QuickSort; 'y1=Z
import org.rut.util.algorithm.support.SelectionSort; /Ue~W,|
import org.rut.util.algorithm.support.ShellSort; A+AqlM+$i
|iU#!+zY
/** ">|fB&~A
* @author treeroot hl8[A-d(R
* @since 2006-2-2 EP*"=_
* @version 1.0 ,_HVPE
*/ M1^pf<!s
public class SortUtil { oQAD 3a
public final static int INSERT = 1; ^2=11
public final static int BUBBLE = 2; dG\dGSZ\h
public final static int SELECTION = 3; "??$yMW
public final static int SHELL = 4; =5isT
public final static int QUICK = 5; qh{hpX)\D
public final static int IMPROVED_QUICK = 6; h?jKq2`
public final static int MERGE = 7; R]H/Jv\'
public final static int IMPROVED_MERGE = 8; \G:\36l
public final static int HEAP = 9; _DS_AW}D
mGb,oj7l
public static void sort(int[] data) { e2~&I`ct
sort(data, IMPROVED_QUICK); n'>`2 s
} gy0l@ 5 N
private static String[] name={ DHQavHqbZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~"xc 3(h
}; eh`n?C
<'f+nC=2
private static Sort[] impl=new Sort[]{ 7M9Ey29f
new InsertSort(), e'Njl?>3
new BubbleSort(), 8R0Q-,'
new SelectionSort(), 'W(!N%u
new ShellSort(), {B+|",O5)
new QuickSort(), =wEU+R_#o
new ImprovedQuickSort(), ,ELbm
new MergeSort(), 9}G.Fr
new ImprovedMergeSort(), N;gI %6
new HeapSort() kyR=U`OW
}; ()%NotN;
;d5d$Np@m&
public static String toString(int algorithm){ iW oe
return name[algorithm-1]; f_'#wc6
} @~1}n/
D[#6jJAb
public static void sort(int[] data, int algorithm) { NFsj ~6F#
impl[algorithm-1].sort(data); H+lBb$
} o>~xrV`E
fRlO.!0(
public static interface Sort { *{TB<^ *
public void sort(int[] data); @ (4$<><
} m6+4}=Cn
% XvJJ
public static void swap(int[] data, int i, int j) { 'fo.1
int temp = data; E)ne z
data = data[j]; ny++U;qi
data[j] = temp; }:SWgPfc
} U?/C>g%/PI
} >/J!:Htk+K