[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; g Z3VT{
} /BC(O[P
int i1=l; ;u;YfOr
int i2=mid+1; 'A91i
for(int cur=l;cur<=r;cur++){ 3UeG>5R
if(i1==mid+1) (1e;7sNG@
data[cur]=temp[i2++]; 1g`$[wp|
else if(i2>r) zjd]65P
data[cur]=temp[i1++]; ;OW`(jC
else if(temp[i1] data[cur]=temp[i1++]; l'YpSO~l7
else :CEhc7gU
data[cur]=temp[i2++]; @+A`n21,O
} 75vd ]45as
} `X?l`H;#
':yE5j
} xQs2)
xM85^B'
改进后的归并排序: @DK,ka(
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package org.rut.util.algorithm.support; 6L@g]f|Y@
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import org.rut.util.algorithm.SortUtil; & i|x2; v
4)Y=)#=
/** <rc3&qmd
* @author treeroot P\bW kp0
* @since 2006-2-2 jYKs| J)[
* @version 1.0 LLOe
*/ )_!t9gn*wr
public class ImprovedMergeSort implements SortUtil.Sort { fx|$(D@9
JBQ,rX_Hw
private static final int THRESHOLD = 10; R{S{N2+p(
r-]Au -
/* UNLy{0tA
* (non-Javadoc) qA:CV(Z
* . (*V|&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K V^`
*/ 2&fIF}vk>m
public void sort(int[] data) { vW6Pf^yJ
int[] temp=new int[data.length]; 2#'{Q4K
mergeSort(data,temp,0,data.length-1); ehj&A+Ip
} "PGEiLY
%Bg} a
private void mergeSort(int[] data, int[] temp, int l, int r) { o2?[*pa
int i, j, k; l'-dB
int mid = (l + r) / 2; UMUr"-l =
if (l == r) Q%~b(4E^7P
return; {>>ozB.
if ((mid - l) >= THRESHOLD) WQ4:='(
mergeSort(data, temp, l, mid); 4A0R07"
else e#L/
insertSort(data, l, mid - l + 1); B&|F9Z6D
if ((r - mid) > THRESHOLD) y|V/xm+Fp
mergeSort(data, temp, mid + 1, r); )ARfI)<1b
else l i}4d+
insertSort(data, mid + 1, r - mid); 7QL>f5Q
kV"';a
for (i = l; i <= mid; i++) { ch,<4E/c[R
temp = data; c:"*MM RC
} l){l*~5zl2
for (j = 1; j <= r - mid; j++) { 7~TE=t
temp[r - j + 1] = data[j + mid]; mJ0nyjX^
} ?1}1uJMj-
int a = temp[l]; OtJYr1:y_
int b = temp[r]; pgT{#[=>
for (i = l, j = r, k = l; k <= r; k++) { k7)H%31;
if (a < b) { R{)Sv|+`
data[k] = temp[i++]; HB`u@9le
a = temp; c ;`
} else { l/;OC
data[k] = temp[j--]; oH!sJ&"#_
b = temp[j]; 6grJoim|
} ":?>6'*1
} @P+k7"f
} Y[Us"K`
h";G vjy
/** ("o<D{A
* @param data 2S}%r4$n}
* @param l qQ%zSJ?
* @param i ZN5\lon|Y
*/ punc'~
private void insertSort(int[] data, int start, int len) { F7UY>z3jL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @5Q}o3.zA-
} ^#e:q
} .z7XYmv
} :6PWU$z$7
} 3JEH sYxs
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堆排序： MzYTEe&-L
Z'<=06
package org.rut.util.algorithm.support; Ta?#o
|332G64K
import org.rut.util.algorithm.SortUtil; 1 9a"@WB@
j(6:
/** P (jlWr$$
* @author treeroot UZMo(rG.]{
* @since 2006-2-2 Ps Qq^/
* @version 1.0 BIDmZU9tL
*/ ^CI.F.#X|
public class HeapSort implements SortUtil.Sort{ %k{~Fa
g1muT.W]S
/* (non-Javadoc) r Y|'<$wvg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) No<2+E!
*/ 4fw>(d(2
public void sort(int[] data) { bmhvC9
MaxHeap h=new MaxHeap(); D|9C|q
h.init(data); ,%mTKOs
for(int i=0;i h.remove(); l/[@1(F
System.arraycopy(h.queue,1,data,0,data.length); JT&CJ&#[h
} :1eI"])(
3SVI|A5(d
private static class MaxHeap{ O\pqZ`E=s
kmNY ;b6Y$
void init(int[] data){ oP5G*AFUq
this.queue=new int[data.length+1]; >>Hsx2M
for(int i=0;i queue[++size]=data; #*,Jqr2f
fixUp(size); \bqNjlu
} @JE:\
} C\dQ6(3}\
jJ?MT#v
private int size=0; TbU\qcm]]
Mkko1T=6
private int[] queue; !(F+~,
UP 1Y3
public int get() { W"AWhi{h
return queue[1]; 2:MB u5**
} 3X*;.'#Z
!Zgb|e8<
public void remove() { jii2gtu'U
SortUtil.swap(queue,1,size--); X_+`7yCi"x
fixDown(1); AvRZf-Geg
} Crh5^?
file://fixdown ~ygiKsD6b
private void fixDown(int k) { [=u8$5/a
int j; y.JAtsxD
while ((j = k << 1) <= size) { `r'q(M
if (j < size %26amp;%26amp; queue[j] j++; XJ?|\=]
if (queue[k]>queue[j]) file://不用交换 "v/^nH
break; )FT~gl%
SortUtil.swap(queue,j,k); 5H:NY|
k = j; -]~U_J]
} 'IFbD["r
} je9[S_Z:Y
private void fixUp(int k) { 0aSN8
while (k > 1) { )NRY9\H
int j = k >> 1; *:\-:*
if (queue[j]>queue[k]) c%>t(ce`Tl
break; heZJ(mR
SortUtil.swap(queue,j,k); KCq qwGM
k = j; ,;;M69c[ x
} 7 ;|jq39
} 6#7f^uIK
1Ls@|
} ly%$>BRU
jIv+=b#oT
} <tuh%k
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SortUtil： R}llj$?
muT+H(Zp}
package org.rut.util.algorithm; jr~ +}|@{
- 4'yp
import org.rut.util.algorithm.support.BubbleSort; G~a;q+7v'$
import org.rut.util.algorithm.support.HeapSort; Hlp!6\gukp
import org.rut.util.algorithm.support.ImprovedMergeSort; Otj=vGr0
import org.rut.util.algorithm.support.ImprovedQuickSort; %bZ3^ ub}t
import org.rut.util.algorithm.support.InsertSort; U|g4t=@ZR
import org.rut.util.algorithm.support.MergeSort; # Fw<R'c
import org.rut.util.algorithm.support.QuickSort; t<$9!"
import org.rut.util.algorithm.support.SelectionSort; ($7>\"+Tl
import org.rut.util.algorithm.support.ShellSort; PkF B.
M7Cq)cT
/** v+znKpE
* @author treeroot ^TVy:5Ag
* @since 2006-2-2 <5@+:7Dv
* @version 1.0 50rCW)[#
*/ =bded(3Z
public class SortUtil { W>K2d
public final static int INSERT = 1; !-2nIY!
public final static int BUBBLE = 2; r-^Ju6w{
public final static int SELECTION = 3; Ag }hyIl
public final static int SHELL = 4; ~bL(mq
public final static int QUICK = 5; ppN96-]^0
public final static int IMPROVED_QUICK = 6; |q^e&M<
public final static int MERGE = 7; !ceuljd]
public final static int IMPROVED_MERGE = 8; LDBxw
public final static int HEAP = 9; [ 8N1tZ{`
QKCc5
public static void sort(int[] data) { jeN_ sm81b
sort(data, IMPROVED_QUICK); ?CAP8_
} Jh{(xGA
private static String[] name={ SLSJn))@!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L q'*B9
}; x@m"[u
;Y?7|G97*S
private static Sort[] impl=new Sort[]{ \s`'3y
new InsertSort(), G2ZF`WQ
new BubbleSort(), %N|7<n<S
new SelectionSort(), }%| (G[
new ShellSort(), yb*SD!
new QuickSort(), $ n`<,;^l
new ImprovedQuickSort(), #lM!s
new MergeSort(), Mto3Ryic!
new ImprovedMergeSort(), W>wIcUP<<
new HeapSort() %LXk9K^]e
}; %.pX!jL
(=CV")tF
public static String toString(int algorithm){ *^=`HE89S
return name[algorithm-1]; 2fO ~%!.G
} *1ekw#'
/_xwHiA
public static void sort(int[] data, int algorithm) { Rde#=>@V
impl[algorithm-1].sort(data); X4BDl
} pJ6bX4QnDX
{K*l,U
public static interface Sort { ZajQ B
public void sort(int[] data); AQ32rJT8c`
} 1jh^-d5
I/|)?
public static void swap(int[] data, int i, int j) { ~kS~v
int temp = data; r5(OH3
data = data[j]; `dMOBYV
data[j] = temp; g`y >)N/
} }pu2/44=W
} 4Yt:PN2