[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; %5h^`lp
} %f(S'<DhC
int i1=l; JzMZB"Z?
int i2=mid+1; pDq#8*q+v
for(int cur=l;cur<=r;cur++){ lRDxIuTK
if(i1==mid+1) YZGS-+
data[cur]=temp[i2++]; 2L2 VVO
else if(i2>r) 1n'$Ji7
data[cur]=temp[i1++]; #SQvXMT
else if(temp[i1] data[cur]=temp[i1++]; &Vt2be*
else &xiOTkqB
data[cur]=temp[i2++]; s=N#CE
} #, Q}NO#vT
} /2e%s:")h
X0WNpt&h
} 2QGMe}
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改进后的归并排序: wmo{YS3t|
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package org.rut.util.algorithm.support; W|dpFh`
qO-C%p [5
import org.rut.util.algorithm.SortUtil; MBB5wj
r219M)D?
/** s>|Z7[*
* @author treeroot 4.|-m.a
* @since 2006-2-2 S Pn8\2Cj
* @version 1.0 =4tO0
*/ c^=R8y-N
public class ImprovedMergeSort implements SortUtil.Sort { ~uI**{
{'h_'Y`bOQ
private static final int THRESHOLD = 10; yGiP[d|tRc
W]]q=c%2
/* (=1q!c`
* (non-Javadoc) $n= O
* ZXsYn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dEASvD'
*/ lC#RNjDp/~
public void sort(int[] data) { G02ox5X
int[] temp=new int[data.length]; q2e]3{l3
mergeSort(data,temp,0,data.length-1); bj@xqAGl
} Q,.By&
dv;9QCc'
private void mergeSort(int[] data, int[] temp, int l, int r) { <EMkD1e
int i, j, k; =m}TU)4.
int mid = (l + r) / 2; I>A^I
if (l == r) ]gu1#
return; n]+.
if ((mid - l) >= THRESHOLD) ;XG]Q<S\
mergeSort(data, temp, l, mid); BhKO_wQ?:J
else L=,OZ9aA
insertSort(data, l, mid - l + 1); }YQ:6I
if ((r - mid) > THRESHOLD) &=6%>
mergeSort(data, temp, mid + 1, r); <cYp~e%xIw
else .f>,6?
insertSort(data, mid + 1, r - mid); Dg~ [#C-
:pwa{P
for (i = l; i <= mid; i++) { |;P^clS3
temp = data; 8xgJSk
} q]^,vei
for (j = 1; j <= r - mid; j++) { pOMgEEhfS
temp[r - j + 1] = data[j + mid]; _J,xT
} flG=9~qcGQ
int a = temp[l]; 2MuO*.9D
int b = temp[r]; ga-{!$b*
for (i = l, j = r, k = l; k <= r; k++) { tBseqS3<
if (a < b) { OX+hZ<y
data[k] = temp[i++]; 6lsL^]7
a = temp; *>k!hq;j
} else { $A`xhh[
data[k] = temp[j--]; %e{(twp
b = temp[j]; f=o4I2Y[
} <Nex8fiJ9
} pI>*u ]x
} "u;YI=+
vM`7s[oAK
/** JSgpb?(
* @param data FI{AZb_'
* @param l HT"gT2U+
* @param i xW>ySEf
*/ lkA^\+Ct
private void insertSort(int[] data, int start, int len) { Cxm6TO`-;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xuUx4,Z
} S[mM4et|
} gg[9u-
} D`VFf\7
} Vclr2]eV4O
EMlIxpCn:
堆排序： "jR]MZ
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package org.rut.util.algorithm.support; P16YS8$
)~V}oKk0t
import org.rut.util.algorithm.SortUtil; 5Z{_m;I.
4T`&Sl
/** ;,XyN+2H
* @author treeroot ;/'|WLI9
* @since 2006-2-2 =Vb~s+YW
* @version 1.0 q[ULGv
*/ .:y5U}vR
public class HeapSort implements SortUtil.Sort{ ^s{hs(8%R
:p>hW!~
/* (non-Javadoc) O*G1 QX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l~J*' m2
*/ IU#x[P!
public void sort(int[] data) { 5ZK&fKeCF
MaxHeap h=new MaxHeap(); d~@q%-`lA
h.init(data); /r^[a,Q#x
for(int i=0;i h.remove(); b9Y_!Qe
System.arraycopy(h.queue,1,data,0,data.length); -$JO8'TP
} >w.'KR0L
`T"rG}c
private static class MaxHeap{ c@R; /m:R
\a))
void init(int[] data){ uZIJoT
this.queue=new int[data.length+1]; )(m0cP{7
for(int i=0;i queue[++size]=data; 5mgHlsDzu
fixUp(size); y-B=W]E
} *C6D3y
} :#u}.G
r_U>VT^E:
private int size=0; uS<_4A;sD,
$^_|j1z#i
private int[] queue; p|qyTeg
;YyXT"6/p
public int get() { rh%m;i<b
return queue[1]; 3o6RbW0[
} |P~;C6sf
2f{T6=SK
public void remove() { i sW\MB]
SortUtil.swap(queue,1,size--); pQWHG#?7
fixDown(1); #NNewzC<*
} NfzF.{nh
file://fixdown =o^|bih
private void fixDown(int k) { WeMAe w/d
int j; R7?29?$7
while ((j = k << 1) <= size) { |`O7nOM
if (j < size %26amp;%26amp; queue[j] j++; `rb>K
if (queue[k]>queue[j]) file://不用交换 Dl C@fZD
break; ".U^ifF
SortUtil.swap(queue,j,k); riCV&0"n
k = j; WE6\dhJ<
} }Ln@R~[
} ~/-eyxLTm
private void fixUp(int k) { -rSIBc:$8
while (k > 1) { {fDTSr?/
int j = k >> 1; vF4]ux&
if (queue[j]>queue[k]) 7G93,dJ
break; j9R6ta3\l
SortUtil.swap(queue,j,k); `tEo]p
k = j; ^G1%6\We
} 4n0xE[-
} /)>S<X
cYNV\b4-
} lr@#^
,Zf 9RM
} o[\HOe~;
p9qKLJ*.C
SortUtil： $m| V :/
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package org.rut.util.algorithm; <a^Oj LLU
BR5BJX
import org.rut.util.algorithm.support.BubbleSort; [A2`]CE<@
import org.rut.util.algorithm.support.HeapSort; (Ddp|a"b
import org.rut.util.algorithm.support.ImprovedMergeSort; .12aUXo(
import org.rut.util.algorithm.support.ImprovedQuickSort; </"4 zD|
import org.rut.util.algorithm.support.InsertSort; $_;e>*+x
import org.rut.util.algorithm.support.MergeSort; 1wj:aD?g
import org.rut.util.algorithm.support.QuickSort; /JJw 6[N
import org.rut.util.algorithm.support.SelectionSort; n,'OiVl[
import org.rut.util.algorithm.support.ShellSort; h9s >LY
FMw&(
/** '0RwO[A#1
* @author treeroot G"SBYU
* @since 2006-2-2 {zLhiUH a0
* @version 1.0 3ec`Wa
*/ iw9Q18:I}
public class SortUtil { 5F"|E-;
public final static int INSERT = 1; B4Y(?JTx
public final static int BUBBLE = 2; #*%q'gyHT
public final static int SELECTION = 3; tY|8s]{2
public final static int SHELL = 4; ~x:DXEV,
public final static int QUICK = 5; w.{&=WTr
public final static int IMPROVED_QUICK = 6; v-b0\_
public final static int MERGE = 7; lUOvm\
public final static int IMPROVED_MERGE = 8; $md%xmQ[
public final static int HEAP = 9; c=O,;lWFqm
w'Tq3-%V
public static void sort(int[] data) { -~{c u47_
sort(data, IMPROVED_QUICK); z+{,WHjo
} / |r'
private static String[] name={ .="bzgC3A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9!',b>C6
}; !YL..fb
XOP"Px@
private static Sort[] impl=new Sort[]{ / ~%KVe
new InsertSort(), .Pndx%X9s
new BubbleSort(), Jju#iwb
new SelectionSort(), \nNXxTxX!
new ShellSort(), dihjpI_
new QuickSort(), |SZo' 6
new ImprovedQuickSort(), tRb]7 z
new MergeSort(), 1{x.xi"A/
new ImprovedMergeSort(), SLL3v,P(7
new HeapSort() /1UOT\8U
}; \Q?ip&R
rqPo)AL
public static String toString(int algorithm){ LpbsYl
return name[algorithm-1]; v X~RP *
} $ ,Ck70_
mEG6
public static void sort(int[] data, int algorithm) { uF|3/x=
impl[algorithm-1].sort(data); n.MRz WJpZ
} gmKGy@]
HSUI${<
public static interface Sort { 0oZsb\
public void sort(int[] data); g#]" hn
} 3f.b\4 U
t_z>Cl^u
public static void swap(int[] data, int i, int j) { C*=Xk/0
int temp = data; _9 .(a
data = data[j]; r|Z3$J{^"
data[j] = temp; `:8J46or
} pIV-kI:w
} olB)p$aH#