[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; K^vp(2
} z){UuiUM+=
int i1=l; [a)~Dui0@\
int i2=mid+1; +R#`j r"
for(int cur=l;cur<=r;cur++){ ptcLJ]+)
if(i1==mid+1) 8*#][wC2
data[cur]=temp[i2++]; ]az} n(B,
else if(i2>r) 6>BDA?
data[cur]=temp[i1++]; kw^Dp[8X
else if(temp[i1] data[cur]=temp[i1++]; @!a]qAt
else D^s0EW-E
data[cur]=temp[i2++]; ;]ShC\1
} 5652'p
} Z^`=!n-V
ar qLp|
} y[WYH5&DJ
D ,ZNh1xt
改进后的归并排序: #8f"}>U9.,
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package org.rut.util.algorithm.support; txfwLqx
Pv-V7`{
import org.rut.util.algorithm.SortUtil; lzy$.H"W
mERZ_[a2
/** _ K+V?-=
* @author treeroot 0HJqsSZ$mW
* @since 2006-2-2 2V2x,!
* @version 1.0 UE,~_hp
*/ ~R?dDL
public class ImprovedMergeSort implements SortUtil.Sort { PDq}Tq
8P<UO
private static final int THRESHOLD = 10; T3t~=b>&L
Ul713Bjz
/* {8Jk=)(md
* (non-Javadoc) mf;^b.mKh
* h[|zs>p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FP'u)eU&3
*/ SeZT4y*=
public void sort(int[] data) { GE~(N N
int[] temp=new int[data.length]; 1[/$ZYk:
mergeSort(data,temp,0,data.length-1); N]s7/s
} vzyI::f?
!Ir1qt8T
private void mergeSort(int[] data, int[] temp, int l, int r) { `\|3 ~_v
int i, j, k; _/]:=_bf_z
int mid = (l + r) / 2; G\:psx/
if (l == r) M*~v'L_sI
return; 6KCCbg/
if ((mid - l) >= THRESHOLD) &v auLp
mergeSort(data, temp, l, mid); >.O*gv/_
else kk/+Vx~
insertSort(data, l, mid - l + 1); %j[LRY/
if ((r - mid) > THRESHOLD) YKw!pu=
mergeSort(data, temp, mid + 1, r); ZLN_,/7
else 1^60I#Vr@
insertSort(data, mid + 1, r - mid); W]!@Zlal
l\sS?
for (i = l; i <= mid; i++) { 2 -p
temp = data; ycl>git]
} ]EVe@
for (j = 1; j <= r - mid; j++) { ^!o1l-Y^gr
temp[r - j + 1] = data[j + mid]; !7kLFW
} H81.p
int a = temp[l]; PX69
int b = temp[r]; iA%' ;V
for (i = l, j = r, k = l; k <= r; k++) { @!&Jgg53G
if (a < b) { #lyM+.T
data[k] = temp[i++]; K[#v(<)
a = temp; Qw6KX#n
} else { p-i.ITRS
data[k] = temp[j--]; |auX*hb9
b = temp[j]; 1O]5/Eu
} f1CMR4D
} !rsa4t@t
} |?2 hml
i!.I;@
/** Wlr&g xZ
* @param data ET,0ux9F
* @param l %Vw|5yA4
* @param i X@bn??
*/ QWzOp\+
private void insertSort(int[] data, int start, int len) { r(,= uLc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); da9*9yN
} (pT(&/\8
} co$Hi9JE
} z|G|Y 22
} jHu,u|e0>S
,#P,B;r~
堆排序： &Hlm{FHU
7z/(V\9B
package org.rut.util.algorithm.support; <m Ju v
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import org.rut.util.algorithm.SortUtil; *w'q
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/** wr3_Bf3]
* @author treeroot xs2,t*
* @since 2006-2-2 f!M[awj%
* @version 1.0 Z^'?|qFj!
*/ &J lpA<^s;
public class HeapSort implements SortUtil.Sort{ j.=UI-&m
|<j,Tr1[
/* (non-Javadoc) }@rg5$W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9S:{
*/ v+!y;N;Q
public void sort(int[] data) { fCt^FU
MaxHeap h=new MaxHeap(); /RJ6nmN@}
h.init(data); DD12pL{QA
for(int i=0;i h.remove(); zz(!t eBC
System.arraycopy(h.queue,1,data,0,data.length); 3~[`[4n^
} _DPB?)!x
e5qrQwU
private static class MaxHeap{ ill-%OPeg
{h/OnBwG
void init(int[] data){ %XEKhy
this.queue=new int[data.length+1]; 0On?{Bw
for(int i=0;i queue[++size]=data; qYgwyj=4
fixUp(size); kfMhw M8kP
} QHHW(InG<
} ZdE>C
a)3O? Y
private int size=0; Vl5SL{+D
_o@(wGeu#
private int[] queue; G$?|S@I,
4zo4H~@gk
public int get() { ~q0I7M
return queue[1]; [,OJX N-4s
} '}U_D:o.b
Zdv.PGn
public void remove() { u-AWJc+F.
SortUtil.swap(queue,1,size--); V,>+G6e
fixDown(1); *'UhlFed
} 0K=Qf69Y
file://fixdown CCbkxHMf|!
private void fixDown(int k) { .dD9&n;#^
int j; B<|:K\MA
while ((j = k << 1) <= size) { 1*C:hg@
if (j < size %26amp;%26amp; queue[j] j++; 8q]J;T
if (queue[k]>queue[j]) file://不用交换 Wmzq
break; !1ML%}vvB,
SortUtil.swap(queue,j,k); t{/hkXq]
k = j; ,sO:$
} (H&@u9K?a?
} qSFc=Wwc
private void fixUp(int k) { vVI6m{zYV
while (k > 1) { j2RRSz&9
int j = k >> 1; [leW/2i
if (queue[j]>queue[k]) Um]p&phVL
break; Sg-g^dIN1
SortUtil.swap(queue,j,k); VK@$JwdL
k = j; U8CWz!;Qz
} 6BDt.bG
} |BwRlE2CFO
El~-M`Gf
} UH5w7M
W[@i;f^g
} ,/i_QgP
k/df(cs
SortUtil： @O@fyAz
{SF[I
package org.rut.util.algorithm; J&A;#<qY
M-{*92y& |
import org.rut.util.algorithm.support.BubbleSort; RXGHD19]
import org.rut.util.algorithm.support.HeapSort; 6!ZVd#OM%
import org.rut.util.algorithm.support.ImprovedMergeSort; \.c]kG>k-
import org.rut.util.algorithm.support.ImprovedQuickSort; M6J/mOVx5
import org.rut.util.algorithm.support.InsertSort; zL9VR;q
import org.rut.util.algorithm.support.MergeSort; ~}h^38
import org.rut.util.algorithm.support.QuickSort; ,5/V@;i
import org.rut.util.algorithm.support.SelectionSort; q.-y)C) ;
import org.rut.util.algorithm.support.ShellSort; _e6a8
>R(8/#|E
/** \M7I&~V
* @author treeroot {I`B[,*
* @since 2006-2-2 CV s8s
* @version 1.0 *i`v~>
*/ UE^D2u
public class SortUtil { -g:lOht
public final static int INSERT = 1; DKh}Y !Q=:
public final static int BUBBLE = 2; L'>s(CR
public final static int SELECTION = 3; 1<`9HCm
public final static int SHELL = 4; w|=gSC-o
public final static int QUICK = 5; N6h1|_o
public final static int IMPROVED_QUICK = 6; 6MuWlCKF8
public final static int MERGE = 7; +W6Hva.
public final static int IMPROVED_MERGE = 8; ,*7H|de7
public final static int HEAP = 9; Am=wEu[b
HzE1r+3Q@
public static void sort(int[] data) { WNhbXyp_
sort(data, IMPROVED_QUICK); H6_xwuw:
} [!G)$<
private static String[] name={ 4RhR[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +)gGs#2X
}; Wdo#?@m
,E&Bn8L~O
private static Sort[] impl=new Sort[]{ u,fA!
new InsertSort(), v51EXf
new BubbleSort(), U|8[#@r
new SelectionSort(), So#dJ>
new ShellSort(), 5^>n5u/
new QuickSort(), ^OF5F8Tf/
new ImprovedQuickSort(), |=\91fP68`
new MergeSort(), Raefj(^V
new ImprovedMergeSort(), 1 o|T
new HeapSort() X:_<Y_JT
}; Rvvh{U;t
s|Zx(.EP
public static String toString(int algorithm){ 8zZSp
return name[algorithm-1]; ^;zWWg/d
} en>9E.?N
s;J\Kc?"|
public static void sort(int[] data, int algorithm) { m=QCG)s
impl[algorithm-1].sort(data); vh &GIb
} Ivsb<qzG
rR]-RX(
public static interface Sort { 4YLs^1'TG0
public void sort(int[] data); 2/@D7>F&g
} [h4o7
E:FO_R(Xq
public static void swap(int[] data, int i, int j) { 8Y#bN*!
int temp = data; %w7m\nw@
data = data[j]; ZW*n /#GUC
data[j] = temp; JvkL37^n:
} ^n9a" qz
} ,-@5NY1q