[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; N Sh.g#
} <ut DZ#k
int i1=l; Crhi+D
int i2=mid+1; M96( Rg
for(int cur=l;cur<=r;cur++){ WhZaq
if(i1==mid+1) 05KoxFO?
data[cur]=temp[i2++]; jDX<iX%e
else if(i2>r) mVK9NK
data[cur]=temp[i1++]; &7T H V
else if(temp[i1] data[cur]=temp[i1++]; 8-"5|pNc
else ?66(t
data[cur]=temp[i2++]; ]X~g@O{>_
} Kyp0SZp[
} kNj3!u$
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} 8>{W:?I
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改进后的归并排序: 8KtgSash
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package org.rut.util.algorithm.support; 3> #mO}\
9I\3T6&tr
import org.rut.util.algorithm.SortUtil; U('<iw,Yy
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/** jN%p5nZ^EK
* @author treeroot GD[ou.C}k
* @since 2006-2-2 ix9HSa{d
* @version 1.0 8RAeJ~e
*/ !049K!rP{
public class ImprovedMergeSort implements SortUtil.Sort { bkwa{V
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private static final int THRESHOLD = 10; ;:4P'FWm^
%Lp7@
/* >_`D3@Rz
* (non-Javadoc) 7p.h{F'A
* !wd'::C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hO/5>Zv?
*/ So=nB} b[?
public void sort(int[] data) { H_?B{We
int[] temp=new int[data.length]; f5aF6FBH
mergeSort(data,temp,0,data.length-1); 7y)=#ZG'R
} R6Zj=l[
'}Wu3X
private void mergeSort(int[] data, int[] temp, int l, int r) { F@$RV_M
int i, j, k; v1nQs='
int mid = (l + r) / 2; @?Gw|bP
if (l == r) a_{io`h3&
return; 'cZMRRc<
if ((mid - l) >= THRESHOLD) bEBBwv
mergeSort(data, temp, l, mid); )Ig+uDGk
else {OO*iZ.O
insertSort(data, l, mid - l + 1); 1BMB?I
if ((r - mid) > THRESHOLD) X 45x~8f
mergeSort(data, temp, mid + 1, r); j/H>0^
else "Ap$Jl B
insertSort(data, mid + 1, r - mid); KQ4kZN
*BLe3dok(
for (i = l; i <= mid; i++) { .?rbny
temp = data; Tr8AG>
} pw,O"6J*
for (j = 1; j <= r - mid; j++) { VYamskK[G:
temp[r - j + 1] = data[j + mid]; U g}8y8
} ]C16y. ~e
int a = temp[l]; /l,+oG%\
int b = temp[r]; &yxNvyA[u
for (i = l, j = r, k = l; k <= r; k++) { ME$2P!o
if (a < b) { -)1-~7 r
data[k] = temp[i++]; I@0z/4H``
a = temp; CmEpir{}(
} else { ;rB6u_5"I.
data[k] = temp[j--]; E X%6''ys
b = temp[j]; yoBgr7gS
} vBh;
} D]IBB>F
} Deg!<[Nw
3k#[(phk
/** >Z+"`"^o}
* @param data Z_H?WGO
* @param l #`W=mN(+k
* @param i LHh5 v"zjG
*/ r&}(9Cq&"y
private void insertSort(int[] data, int start, int len) { CRH{E}>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !FTNmyM~F
} v" }WP34
} ;{vwBDV!'
} d1v<DU>M
} 2w+U$6e C
V=pMq?Nr
堆排序： gtiEhCF2W
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package org.rut.util.algorithm.support; ? ^M /[@
veeI==]
import org.rut.util.algorithm.SortUtil; _V@WNo%B
JVtQ,oZ
/** 6{q;1-8j+j
* @author treeroot y$X(S\W
* @since 2006-2-2 uG!:Z6%p
* @version 1.0 AS)UJ/lC
*/ UtnZNdlv
public class HeapSort implements SortUtil.Sort{ vw2`:]Q+
A{# Nwd>
/* (non-Javadoc) Ko6^iI1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f`jc#f5+'
*/ ='Q{R*u
public void sort(int[] data) { -KH)J
MaxHeap h=new MaxHeap(); ,apNwkY
h.init(data); >nzu],U
for(int i=0;i h.remove(); oH^(qZ8W
System.arraycopy(h.queue,1,data,0,data.length); -(i(02PX
} y%S1ZTScO
7FLXx?nLY
private static class MaxHeap{ r> k-KdS
5;\gJf
void init(int[] data){ {Z> M
this.queue=new int[data.length+1]; !M7<BD};
for(int i=0;i queue[++size]=data; TX}T|ri
fixUp(size); Rx7X_A}
} (-0ePSOG
} aZ Xmlq
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private int size=0; k'T^dY&c
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private int[] queue; |F[=b'?
iCj2"T4TN
public int get() { )?=YT
return queue[1]; x}TS
} [kV;[c}
/ASaB
public void remove() { )w h%|
SortUtil.swap(queue,1,size--); #>[a{<;Kn
fixDown(1); <IJu7t>
} z'7[Tie
file://fixdown GsQ*4=C
private void fixDown(int k) { fX~'Zk\u
int j; <eN_1NTH_
while ((j = k << 1) <= size) { q%(EYM5Y
if (j < size %26amp;%26amp; queue[j] j++; P>i%7:OMZA
if (queue[k]>queue[j]) file://不用交换 R=Zn -q
break; %FZ2xyI.
SortUtil.swap(queue,j,k); 8uNULob
k = j; ^n1%OzGK#
} t5B7I59
} `B/0iA
private void fixUp(int k) { p;T{i._iL
while (k > 1) { 1Xu?(2;NF
int j = k >> 1; 8:=n*
if (queue[j]>queue[k]) $ _j[2EU
break; ,`D~py,
SortUtil.swap(queue,j,k); Ub1hHA*)
k = j; _VE^/;$"l
} 54lu2gD'
} ]\-^>!F#K
-l~Z0U>^
} /1N6X.Zb
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} C+[%7vF1
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SortUtil： l^GP3S
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package org.rut.util.algorithm; PyVC}dUAX
U,#yqER'r
import org.rut.util.algorithm.support.BubbleSort; }En
import org.rut.util.algorithm.support.HeapSort; **9x?s
import org.rut.util.algorithm.support.ImprovedMergeSort; S/|,u`g-
import org.rut.util.algorithm.support.ImprovedQuickSort; O[tvR:Nh
import org.rut.util.algorithm.support.InsertSort; <,o>Wx*1C
import org.rut.util.algorithm.support.MergeSort; |4$M]Mf0
import org.rut.util.algorithm.support.QuickSort; &'cL%.
import org.rut.util.algorithm.support.SelectionSort; T134ZXqqz
import org.rut.util.algorithm.support.ShellSort; XL#[%X9
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/** Lg8nj< TF
* @author treeroot 7Q\|=$2
* @since 2006-2-2 XE^)VLH:
* @version 1.0 X%yO5c\l2
*/ *6HTV0jv
public class SortUtil { oFOnjK"|F
public final static int INSERT = 1; 4iSa7YqhBT
public final static int BUBBLE = 2; ;iDPn2?6?x
public final static int SELECTION = 3; a]Lp?
public final static int SHELL = 4; y#}cC+;
public final static int QUICK = 5; %%(R@kh9
public final static int IMPROVED_QUICK = 6; LU!dN"[k
public final static int MERGE = 7; vJAZ%aW
public final static int IMPROVED_MERGE = 8; $w"$r$K9K
public final static int HEAP = 9; +P.+_7+:
ss;R8:5
public static void sort(int[] data) { \*=7#Vd
sort(data, IMPROVED_QUICK); v<Bynd-
} SG6sw]x
private static String[] name={ !i=nSqW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eQQ>
}; wAnb Di{W
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private static Sort[] impl=new Sort[]{ f/CuE%7BR
new InsertSort(), CI3XzH\IX*
new BubbleSort(), B"%{i-v>**
new SelectionSort(), N},n `Yl.
new ShellSort(), Y@PI {;!
new QuickSort(), JxyB(
new ImprovedQuickSort(), )BRKZQN
new MergeSort(), T#bu V
new ImprovedMergeSort(), 'Ei;^Y 1e
new HeapSort() &=4(l|wcg
}; y8fsveX
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public static String toString(int algorithm){ #s!'+|2n
return name[algorithm-1]; |!y A@y?
} ~axjjv
#A]-ax?Qc}
public static void sort(int[] data, int algorithm) { /lafve~
impl[algorithm-1].sort(data); *Vho?P6y\Y
} N/GQt\tV<
~F1:N>>_Cf
public static interface Sort { u ElAnrm
public void sort(int[] data); NH3cq
} ;'-olW~
I*VCpaA
public static void swap(int[] data, int i, int j) { ^{8Gt@
int temp = data; 3"rzb]=R
data = data[j]; 8uA,iYD
data[j] = temp; Xt#1Qs
} s`#(
} cW+t#>'r