[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*okYM
} IqV"4
int i1=l; 71@kIJI
int i2=mid+1; { TI,|'>5[
for(int cur=l;cur<=r;cur++){ VXiU5n^
if(i1==mid+1) =xDxX#3
data[cur]=temp[i2++]; g0"xG}d
else if(i2>r) `*[\b9>
data[cur]=temp[i1++]; !@])Ut@tN
else if(temp[i1] data[cur]=temp[i1++]; ?FNgJx*\S
else X $V_
data[cur]=temp[i2++]; bl&9O
} 6\u. [2lE^
} nBd]rak'
mhv6.W@
} ,tQNL\t
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改进后的归并排序: EZ{{p+e^
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package org.rut.util.algorithm.support; \BH?GMoP
:%33m'EV}
import org.rut.util.algorithm.SortUtil; kP}l"CN4
50|nQ:u,
/** 5x|$q kI
* @author treeroot E.;Hm;
* @since 2006-2-2 O7_y QQAA
* @version 1.0 -W.-m2:1
*/ WV'u}-v^
public class ImprovedMergeSort implements SortUtil.Sort { f+ZOE?"
*;McX
private static final int THRESHOLD = 10; ~:k r;n2
^wc:qll
/* wLiPkW
* (non-Javadoc) E+EcXf
* sN-u?EiF8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gx^_bHh
*/ F'>yBDm*OM
public void sort(int[] data) { S&-F(#CF^
int[] temp=new int[data.length]; Xjxa 2D
mergeSort(data,temp,0,data.length-1); <,it<$f#
} '5*&
N-b'O`C
private void mergeSort(int[] data, int[] temp, int l, int r) { TD*AFR3Oz
int i, j, k; 3?<A]"X.
int mid = (l + r) / 2; B5+Q%)52
if (l == r) -6WSYpHV
return; i;/;zG^=_
if ((mid - l) >= THRESHOLD) !gV{[j?~zr
mergeSort(data, temp, l, mid); )Ghw!m
else 7O%^4D
insertSort(data, l, mid - l + 1); THX% z `
if ((r - mid) > THRESHOLD) G;#xcld
mergeSort(data, temp, mid + 1, r); >EA\KrjW
else /&G|.Cx
insertSort(data, mid + 1, r - mid); Het>G{
oxeIh9 E
for (i = l; i <= mid; i++) { k:iy()n[
temp = data; >ySO.S
} _<2{8>EVf
for (j = 1; j <= r - mid; j++) { Wl=yxJu_(
temp[r - j + 1] = data[j + mid]; |;(P+Q4lB
} hT_Q_1,
int a = temp[l]; e2G;_:
int b = temp[r]; v8'XchJ
for (i = l, j = r, k = l; k <= r; k++) { = =Q*|L-g
if (a < b) { lTN^c?
data[k] = temp[i++]; +_vf=d
a = temp; b&QI#w
} else { )h>dD
data[k] = temp[j--]; \+/ciPzA-
b = temp[j]; I*JJvqh
} 3}3b@:<
} UUbO\_&y
} z[Qe86L
nQ|($V1?W
/** B]b/(Q+
* @param data 0wSy[z4V
* @param l t5i58@{~
* @param i %qE"A6j
*/ =\oW{?
private void insertSort(int[] data, int start, int len) { ez%:>r4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "|Yy"iB[
} }wBpBw2J
} MT)q?NcG
} cD!E.2[
} (Rq6m`M2
`D=d!!1eUi
堆排序： &w`Ho)P
/[/{m]
package org.rut.util.algorithm.support; =;Co0Q`
-bSM]86
import org.rut.util.algorithm.SortUtil; c3c3T`B
VG$;ri>
/** 9AQ,@xP|
* @author treeroot zLg$|@E&
* @since 2006-2-2 o /1+ }f
* @version 1.0 *V+,X
*/ m#O; 1/P
public class HeapSort implements SortUtil.Sort{ ;l0%yg/}
HFFrS%
/* (non-Javadoc) i-p,x0th
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c(b`eUOO
*/ >\J<`
public void sort(int[] data) { aZa1eE
MaxHeap h=new MaxHeap(); X_bB6A6
h.init(data); U,fPG/9
for(int i=0;i h.remove(); q&NXF(
System.arraycopy(h.queue,1,data,0,data.length); lg ,%
} &t_TLV 8T
R3piI&u
private static class MaxHeap{ ZZ :*c"b:
-'WR9M?fq
void init(int[] data){ G-]<+-Q$4
this.queue=new int[data.length+1]; ,VUOsNN4\
for(int i=0;i queue[++size]=data; 3i4m!g5Z?
fixUp(size); -{z[.v.p
} 5 I#-h<SG
} 2S[:mnK
v6! `H
private int size=0; 9asA-'fZ
d>#X+;-k
private int[] queue; l>BM}hS
4R8Qn^
public int get() { 83#<Yxk~
return queue[1]; Ro<5c_k
} 2lN0Sf@
Pd `~#!
public void remove() { VJCj=jX
SortUtil.swap(queue,1,size--); Y<N#{)Q
fixDown(1); ~]<VEji
} +~,q"6
file://fixdown )MoHY
private void fixDown(int k) { WHLTJ]OB
int j; :8N by$#V
while ((j = k << 1) <= size) { B !rb*"[
if (j < size %26amp;%26amp; queue[j] j++; vJ 28A
if (queue[k]>queue[j]) file://不用交换 *qm>py`O
break; HB.:/5\
SortUtil.swap(queue,j,k); gd7!+6
k = j; Y[rCF=ZVH
} Y(T$k9%}+
} +~ Y.m8
private void fixUp(int k) { x1Gc|K/-
while (k > 1) { eE\T,u5:
int j = k >> 1; `m"K_\w=/
if (queue[j]>queue[k]) t)O]0) s
break; dg+"G|nr
SortUtil.swap(queue,j,k); !V4(- 8
k = j; mOyNl -f
} /%{CJ0Y
} ,#0#1k<Dm
'fzJw
} pk;S"cnk
mr]~(]B?r
} $0~1;@`rQ6
;{e'q?Y
SortUtil： u,`V%J?vW
v!n|X7
package org.rut.util.algorithm; !SLfAFcS
3lS1WA
import org.rut.util.algorithm.support.BubbleSort; &,,:pL[
import org.rut.util.algorithm.support.HeapSort; 7MKZ*f@x;
import org.rut.util.algorithm.support.ImprovedMergeSort; 9"M-nH*<
import org.rut.util.algorithm.support.ImprovedQuickSort; 7kMO);pO
import org.rut.util.algorithm.support.InsertSort; 9%MgAik(
import org.rut.util.algorithm.support.MergeSort; 0juP"v$C>
import org.rut.util.algorithm.support.QuickSort; d5=&:cF
import org.rut.util.algorithm.support.SelectionSort; (~"#=fs.L
import org.rut.util.algorithm.support.ShellSort; e_S,N0
D7jbo[GgS
/** usi3z9P>n
* @author treeroot 6J-=6t|
* @since 2006-2-2 x69RQ+Vw
* @version 1.0 f&Juq8s_0
*/ tq*6]q8c>
public class SortUtil { UzV78^:,iD
public final static int INSERT = 1; 4P7r\hs
public final static int BUBBLE = 2; JM*!(\Y
public final static int SELECTION = 3; 4#B56f8
public final static int SHELL = 4; }+)q/]%
public final static int QUICK = 5; 4i"fHVp8
public final static int IMPROVED_QUICK = 6; %9L+ Q1o
public final static int MERGE = 7; N{a=CaYi+
public final static int IMPROVED_MERGE = 8; L/N%ft]!T
public final static int HEAP = 9; !bn=b>+
' Yy+^iCus
public static void sort(int[] data) { b |ijkys
sort(data, IMPROVED_QUICK); M~.1:%khM
} mWMtz]M}
private static String[] name={ p$Floubh]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d-H03F@N
}; ]#'&x%m
VLbbn
private static Sort[] impl=new Sort[]{ 6R#igLm
new InsertSort(), GgtYO4,
new BubbleSort(), c+##!_[9
new SelectionSort(), /.t1Ow
new ShellSort(), AO(zl*4
new QuickSort(), R)=){SI:1)
new ImprovedQuickSort(), NBw{
new MergeSort(), e0]%ko"
new ImprovedMergeSort(), Z~;rp`P
new HeapSort() A(n3<(O/{Z
}; $qR@;=
c1 j@*6B
public static String toString(int algorithm){ *y|zF6
return name[algorithm-1]; `~NjBtQ
} Q5Epq sKyC
Ieh<|O,-C
public static void sort(int[] data, int algorithm) { |z0% q2(
impl[algorithm-1].sort(data); KC8
} >Udq{<]#r
nZEew.T:6
public static interface Sort { ({cWb:+r
public void sort(int[] data); w,OPM}) il
} TQQh:y
FRsp?i K)
public static void swap(int[] data, int i, int j) { f @Vd'k<
int temp = data; ` ^;J<l
data = data[j]; VKSn \HT~
data[j] = temp; 02-% B~oP
} :G&:v
} ~m[Gp;pL