[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; +h[$\_y
} ]36R_Dp
int i1=l; VJJw"4DJ
int i2=mid+1; eGnc6)x@C
for(int cur=l;cur<=r;cur++){ !y?g$e`
if(i1==mid+1) 0y|}}92:
data[cur]=temp[i2++]; Q{mls
else if(i2>r) c+-L>dsss
data[cur]=temp[i1++]; 0UlaB sv
else if(temp[i1] data[cur]=temp[i1++]; .$S`J2Y
else 0nA17^W
data[cur]=temp[i2++]; 0$* z
} \+S~N:@><k
} R-hqaEB
[YJP
} js7J#b7
bxEb2D
改进后的归并排序: Z\O ,9
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package org.rut.util.algorithm.support; ~])\xC
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import org.rut.util.algorithm.SortUtil; h^34{pKDn
\asF~P
/** r~TiJ?8I
* @author treeroot *F~"4g
* @since 2006-2-2 w.J2pvyB
* @version 1.0 JTl 37j
*/ Qe]@`Vg
public class ImprovedMergeSort implements SortUtil.Sort { /gXli)
wdoA>a?q
private static final int THRESHOLD = 10; )N`ia%p_]
>RE&>T^8
/* g#5g0UP)V
* (non-Javadoc) p;BdzV>
* ]#))#-&1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %^gT.DsX-
*/ Xp._B4g
public void sort(int[] data) { u.8vXc
int[] temp=new int[data.length]; fy9{W@E3p
mergeSort(data,temp,0,data.length-1); d<(1^Rto
} HC}D<FX|
m7^a4
private void mergeSort(int[] data, int[] temp, int l, int r) { W"VN2
int i, j, k; IS]03_uQ
int mid = (l + r) / 2; n4(w?,w}
if (l == r) lb`P9mbr+
return; RYS]b[-xZz
if ((mid - l) >= THRESHOLD) kH1l -mxz
mergeSort(data, temp, l, mid); X#1So.}c
else _N9yC\
insertSort(data, l, mid - l + 1); (al7/EhY
if ((r - mid) > THRESHOLD) DV*8Mkzg
mergeSort(data, temp, mid + 1, r); !0*=z~
else }+i ZY\t
insertSort(data, mid + 1, r - mid); m!N_TOl-^
A{mbL2AxwC
for (i = l; i <= mid; i++) { 1S0Hc5vw
temp = data; "p2 $R*ie
} qPH]DabpI
for (j = 1; j <= r - mid; j++) { {foF[M
temp[r - j + 1] = data[j + mid]; 6~;fj+S
} zUIh8cAoE
int a = temp[l]; wL5IAkq
int b = temp[r]; I2YQIY+
for (i = l, j = r, k = l; k <= r; k++) { _BtppQIWv
if (a < b) { >xJt&jW-
data[k] = temp[i++]; '1=/G7g
a = temp; )'DFDrY
} else { Q*(]&qr"E
data[k] = temp[j--]; roj/GZAy"
b = temp[j]; @ g~kp
} L>xcgV7
} Uu>YE0/)
} ~W%A8`9
%w/o#*j<;
/** D#W{:_f
* @param data 6(DK\58
* @param l xm/v:hl=
* @param i @<W"$_r-
*/ tvf"w`H
private void insertSort(int[] data, int start, int len) { [3t N-aj[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "*kWM
} QRgWzaI
} b;9v.MZ4>g
} XRJ<1w:
} `^wF]R
;# {XNq<1
堆排序： TLPy/,
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package org.rut.util.algorithm.support; A9p$5jt7
H8Pil H
import org.rut.util.algorithm.SortUtil; W{1=O)w
JEU?@J71O
/** rTDx|pvYx
* @author treeroot s:jr/ j!
* @since 2006-2-2 Itj|0PGd
* @version 1.0 xqmJPbA
*/ x%vt$dy*8
public class HeapSort implements SortUtil.Sort{ O 4l[4,`
Fr/8q:m&
/* (non-Javadoc) vh KA8vr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - Kj$A@~x
*/ 8 6?D
public void sort(int[] data) { W%Br%VQJ
MaxHeap h=new MaxHeap(); ;G;vpl
h.init(data); F3,hx
for(int i=0;i h.remove(); Ga N4In[d
System.arraycopy(h.queue,1,data,0,data.length); wgkh}b
} sJt&`kZ
pjIXZ=
private static class MaxHeap{ dH&N<
7EQ |p
void init(int[] data){ N@?Fpmu/k
this.queue=new int[data.length+1]; ^0~?3t5
for(int i=0;i queue[++size]=data; :g+R}TR[i
fixUp(size); I&Yu=v/_
} vRRi"bo
} afGb}8 Q9
q,0o:nI
private int size=0; #E{OOcM
9oc.`-e\?
private int[] queue; l: 1Zq_?v;
Ks8S^77
public int get() { niqiDT/
return queue[1]; FyZw='D
} @xSS`&b
c<pr1g
public void remove() { _d %H;<_
SortUtil.swap(queue,1,size--); c5R58#XK=
fixDown(1); 8yB
} Mm^o3vl
file://fixdown Co[ rhs
private void fixDown(int k) { B~caHG1b
int j; 9_5Fl,u z
while ((j = k << 1) <= size) { 0K@s_C=n#
if (j < size %26amp;%26amp; queue[j] j++; JV(|7Sk
if (queue[k]>queue[j]) file://不用交换 #f\U3p
break; Y.[^3
SortUtil.swap(queue,j,k); &AZr(>
k = j; h&NcN-["
} T$0//7$')
} #N[nvIi}
private void fixUp(int k) { na(@`(j[
while (k > 1) { zRL[.O9
int j = k >> 1; g=o)=sQd
if (queue[j]>queue[k]) |XLx6E2F
break; }yK_2zak5i
SortUtil.swap(queue,j,k); ~ 9^1m
k = j; C8-4 m68"
} a^,6[
} jxZR%D
)+u|qT3%
} ZV,n-M =
|A8xy#
} #'v7mEwt
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SortUtil： UStZ3A'
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package org.rut.util.algorithm; n;xtUw6\
& WYIfx{
import org.rut.util.algorithm.support.BubbleSort; h<$Vry}
import org.rut.util.algorithm.support.HeapSort; IT'~.!o7/
import org.rut.util.algorithm.support.ImprovedMergeSort; zX{[Z
import org.rut.util.algorithm.support.ImprovedQuickSort; *G.6\
import org.rut.util.algorithm.support.InsertSort; k$i76r
import org.rut.util.algorithm.support.MergeSort; !FA^~
import org.rut.util.algorithm.support.QuickSort; 4 "@BbVYR
import org.rut.util.algorithm.support.SelectionSort; wHx1CXC
import org.rut.util.algorithm.support.ShellSort; f:KKOLm
zq8z#FN
/** kbI:}b7H
* @author treeroot 0>)('Kv
* @since 2006-2-2 Y6?d y\
* @version 1.0 <fJoHS
*/ 6HCP1`gg
public class SortUtil { q\x*@KQgM
public final static int INSERT = 1; di "rvw;R
public final static int BUBBLE = 2; z%hB=V!~91
public final static int SELECTION = 3; ;v[F@O~*)
public final static int SHELL = 4; TMhUo#`I|
public final static int QUICK = 5; E;@`{ v
public final static int IMPROVED_QUICK = 6; wbUpD(
public final static int MERGE = 7; vAy`8Q
public final static int IMPROVED_MERGE = 8; :cnH@:
public final static int HEAP = 9; <ij;^ygYD
INyreoMp
public static void sort(int[] data) { QukLsl]U
sort(data, IMPROVED_QUICK); C8m8ys
} }e9E+2}Z\
private static String[] name={ E@}t1!E<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S@k4k^Vg
}; @-NdgM<
`|8)A)ZVT
private static Sort[] impl=new Sort[]{ u#/Y<1gn
new InsertSort(), %F3M\)jU
new BubbleSort(), %A,4vLe~6
new SelectionSort(), JcvWE $
new ShellSort(), %t([
new QuickSort(), 0vqXLFf
new ImprovedQuickSort(), pfe9n[
new MergeSort(), Co4QWyt:
new ImprovedMergeSort(), _ncqd,&z
new HeapSort() '&I.w p`^
}; t9Ht 54
?}D@{%O3T
public static String toString(int algorithm){ )Jz L
return name[algorithm-1]; f[6;)ZA
} 5 UpN/\He
7i`@`0
public static void sort(int[] data, int algorithm) { HC@E&t
impl[algorithm-1].sort(data); w6F4o;<PR
} q=M!YWz
S#/[>Cb
public static interface Sort { ^cz#PNB
public void sort(int[] data); )V*Z|,#no
} ULIbVy7Y
frWw-<HoI
public static void swap(int[] data, int i, int j) { 4N[8LC;MH
int temp = data; n-be8p)-
data = data[j]; *r6+Vz
data[j] = temp; puV(eG
} ytf.$P
} X2 c<.