[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; 0rxGb} b*
} {+V ]@sz
int i1=l; d=dHY(ms]
int i2=mid+1; :"cKxd
for(int cur=l;cur<=r;cur++){ Y~@(
if(i1==mid+1) $.4N@=s,?c
data[cur]=temp[i2++]; S_38U
else if(i2>r) f6 s .xQ
data[cur]=temp[i1++]; GU]kgwSfi
else if(temp[i1] data[cur]=temp[i1++]; _}.WRFIJ@L
else C9*[/|T
data[cur]=temp[i2++]; #44}Snz
} $@84nR{>
} 4K*st8+bl-
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} `cPZsL
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改进后的归并排序: /#zs
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package org.rut.util.algorithm.support; uZ'(fnZ$
&joP-!"
import org.rut.util.algorithm.SortUtil; ?} lqu7S
p-H}NQ\
/** 9+ |W;
* @author treeroot = BbG2k
* @since 2006-2-2 `uC^"R(m
* @version 1.0 ^fmuBe}d{
*/ N?O^"
public class ImprovedMergeSort implements SortUtil.Sort { 4vV\vXT*
wj5,_d)
private static final int THRESHOLD = 10; M>xT\
IkO[R1K
/* rPt
* (non-Javadoc) F<Xtp8
* [~c_Aa+6N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $-]I?cWlQ
*/ N%%trlDXD
public void sort(int[] data) { E6M*o+Y
int[] temp=new int[data.length]; q*kLi~Oe
mergeSort(data,temp,0,data.length-1); .o]9 HbIk5
} x+b.9f4xJ
#qv!1$}2
private void mergeSort(int[] data, int[] temp, int l, int r) { (LJ7xoJ^
int i, j, k; ?Ezy0>j
int mid = (l + r) / 2; 8U}+9
if (l == r) m#4h5_N
return; i)$ySlEh
if ((mid - l) >= THRESHOLD) HE>V\+ AL
mergeSort(data, temp, l, mid); _9q byhS7
else #^(Yw|/K
insertSort(data, l, mid - l + 1); >pe!T aBN
if ((r - mid) > THRESHOLD) W }v ,6Oe
mergeSort(data, temp, mid + 1, r); {rn^
else :#cJZ\YH
insertSort(data, mid + 1, r - mid); g:@4/+TSt
:jC$$oC].
for (i = l; i <= mid; i++) { .zTkOkL
temp = data; lCTXl5J5
} sL;;'S&
for (j = 1; j <= r - mid; j++) { zKp R:F
temp[r - j + 1] = data[j + mid]; ?cn`N|
} bZ^'_OOn
int a = temp[l]; _>;{+XRX[
int b = temp[r]; 'K01"`#
for (i = l, j = r, k = l; k <= r; k++) { <PM.4B@
if (a < b) { <j/wK]d*/
data[k] = temp[i++]; e)m6xiZ
a = temp; p<?lF
} else { B I=57
data[k] = temp[j--]; fRq+pUxU
b = temp[j]; MWK)Bn
} rhZp
} 2 /*z5
} %LD(S*>7
9c[bhGD?
/** Z
* @param data lCBH3-0^
* @param l e+:X%a4\
* @param i |WSpWsr,
*/ ,X;$-.
private void insertSort(int[] data, int start, int len) { _18Z]XtX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rY8(`a
} |o*qZ}6
} lY2~{Y|4s
} R%q:].
} dvz6
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堆排序： UZmo?&y
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package org.rut.util.algorithm.support; \(;u[
` N R,8F
import org.rut.util.algorithm.SortUtil; BPm")DMo
+XW1,ly~
/** (`4&Y-
* @author treeroot gm=C0Sp?
* @since 2006-2-2 yeBfzKI{b
* @version 1.0 ZS=;)
*/ 94|ZY}8|f
public class HeapSort implements SortUtil.Sort{ d$xvM
Bjj=UtI
/* (non-Javadoc) vK+!m~kDu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }2:q#}"
*/ 7FD,TJs
public void sort(int[] data) { 0c1=M|2
MaxHeap h=new MaxHeap(); SuNc&e#(
h.init(data); :eT\XtxM~{
for(int i=0;i h.remove(); /q,=!&f2
System.arraycopy(h.queue,1,data,0,data.length); ;b. m X
} )s4:&!
9_.pLLx
private static class MaxHeap{ Xwjm T
G2 V$8lh
void init(int[] data){ EwgNd Gcj
this.queue=new int[data.length+1]; P}(c0/
for(int i=0;i queue[++size]=data; Gpcordt/
fixUp(size); qn{4AWmJ
} Ciz,1IV
} VS_\bIC
]YfG`0eK<
private int size=0; _qpIdQBo
3)9e-@
private int[] queue; vu}U2 0@
Aq7`A^1t$
public int get() { mwN"Cu4t
return queue[1]; L{l}G,j<
} Ktvs*.?
,\#j6R,{I
public void remove() { UV av^<_
SortUtil.swap(queue,1,size--); Ag*?>I
fixDown(1); `ZO5-E
} DMs8B&Y=
file://fixdown [;4ak)!
private void fixDown(int k) { c&aqN\'4"
int j; rc7c$3#X
while ((j = k << 1) <= size) { mA_EvzXk\
if (j < size %26amp;%26amp; queue[j] j++; <<Y]P+uU
if (queue[k]>queue[j]) file://不用交换 1vCp<D9<
break; fA0wQz]u
SortUtil.swap(queue,j,k); H 8 66,]
k = j; 3RxR'M1
} t6kLZ
} |u$*'EsP
private void fixUp(int k) { 2n2,MB
while (k > 1) { ZCb@!V}=
int j = k >> 1; r2PN[cLu|
if (queue[j]>queue[k]) H@ty'z?
break; RdL5VAD
SortUtil.swap(queue,j,k); &e#pL`N
k = j; +ut%C.1
} g2*}XS3
} ,zH\P+*
]W%rhppC
} QwF.c28[
-em3 #V
} b j<T`M!
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SortUtil： PJe\PGh
iEy2z+/"^
package org.rut.util.algorithm; #)#'^MZX
IM[=]j.?
import org.rut.util.algorithm.support.BubbleSort; D62'bFB^
import org.rut.util.algorithm.support.HeapSort; a8%T*mk(
import org.rut.util.algorithm.support.ImprovedMergeSort; K@!hrye
import org.rut.util.algorithm.support.ImprovedQuickSort; 5GPAt
import org.rut.util.algorithm.support.InsertSort; |Xd&aQ
import org.rut.util.algorithm.support.MergeSort; ;eO Ye3;c
import org.rut.util.algorithm.support.QuickSort; Q&%gpa).W
import org.rut.util.algorithm.support.SelectionSort; RC8-6s& ln
import org.rut.util.algorithm.support.ShellSort; %?qzP'
*tkf)[(
/** 99]s/KD2yb
* @author treeroot #.Ly
* @since 2006-2-2 ANj%q9e!Yi
* @version 1.0 (5[#?_~
*/ x}d5Y
public class SortUtil { 73tjDO7d
public final static int INSERT = 1; @cm[]]f'l
public final static int BUBBLE = 2; !VrBoU4<d
public final static int SELECTION = 3; c\tw#;\9
public final static int SHELL = 4; ?6I`$ &OA
public final static int QUICK = 5; rfZg
public final static int IMPROVED_QUICK = 6; ?9 `T_,
public final static int MERGE = 7; |Q?$n3-f"
public final static int IMPROVED_MERGE = 8; mt e3k=17
public final static int HEAP = 9; 8-b~p
cRf;7G
public static void sort(int[] data) { xcJvXp
sort(data, IMPROVED_QUICK); WFS6N.Ap
} 2elj@EB,M
private static String[] name={ `<Hc,D; p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }:0HM8B7!
}; OU mZ|
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private static Sort[] impl=new Sort[]{ (ueH@A"9;
new InsertSort(), L9whgXD
new BubbleSort(), DAEWa Kui
new SelectionSort(), Xa&:Hg<
new ShellSort(), +ZBj_Vw*|
new QuickSort(), v57Kr ,
new ImprovedQuickSort(), l?;ReK.r
new MergeSort(), :n x;~f
new ImprovedMergeSort(), *S Z]xrs
new HeapSort() U?(,Z$:N
}; y>RqA*J
r&L1jT.
public static String toString(int algorithm){ ~i}/
return name[algorithm-1]; xrJ0
} ?C6`
#KtV4)(
public static void sort(int[] data, int algorithm) { ;{n*F=%uC
impl[algorithm-1].sort(data); a<V Mh79*
} '_g*I
i{J[;rV9
public static interface Sort { v\kd78,
public void sort(int[] data); wo^1%:@/2
} W*4!A\K
<)@^TRS
public static void swap(int[] data, int i, int j) { uQWd`7
int temp = data; O}7aX '
data = data[j]; <R#:K7>O
data[j] = temp; &0-Pl.M
} e9B$"_ &2
} :!,.c$M