[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; BhjDyB
} 'n"we# [
int i1=l; 0k_3]Li=(
int i2=mid+1; ~PAI0+*"q
for(int cur=l;cur<=r;cur++){ a-nn[j
if(i1==mid+1) Gf+X<a
data[cur]=temp[i2++]; 9GT}_ ^fb
else if(i2>r) wSM(!:on5
data[cur]=temp[i1++]; B+jh|@-
else if(temp[i1] data[cur]=temp[i1++]; 8$RiFD,
else 0"GLgj:9
data[cur]=temp[i2++]; _d^d1Q}V
} +BhJske
} S{)K_x
|#BN!kc
} ^xScVOdP
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改进后的归并排序: l+wfP76w
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package org.rut.util.algorithm.support; GjN6Af~}
q<^MC/]
import org.rut.util.algorithm.SortUtil; 9;9ge
g HxRw
/** X f;R'a,$
* @author treeroot k}qCkm27
* @since 2006-2-2 sk:B;.z
* @version 1.0 4hfq7kq7(
*/ O~?d;.b
public class ImprovedMergeSort implements SortUtil.Sort { X(.[rC>
@A`j Wao
private static final int THRESHOLD = 10; "j_cI-@6
6kAGOjO
/* @w(|d<5l:L
* (non-Javadoc) 1*6xFn
* 9&6P,ts%Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wZJbI[r
*/ k=d0%} `M(
public void sort(int[] data) { %\}5u[V
int[] temp=new int[data.length]; 'mm>E
mergeSort(data,temp,0,data.length-1); #_K<-m%9
} K3WaBcm
Ejf5M\o
private void mergeSort(int[] data, int[] temp, int l, int r) { LylCr{s7
int i, j, k; Xx2t0AIB
int mid = (l + r) / 2; !)`*e>]x
if (l == r) yc`3)
return; (c"!&&S^ =
if ((mid - l) >= THRESHOLD) q \fyp\z
mergeSort(data, temp, l, mid); =[Z3]#h
else G;[O~N3n.
insertSort(data, l, mid - l + 1); GDiyFTr
if ((r - mid) > THRESHOLD) p8?"}
mergeSort(data, temp, mid + 1, r); IGlyx'\_
else Y" rODk1
insertSort(data, mid + 1, r - mid); ZSD7%gE<D
oQ*LP{M
for (i = l; i <= mid; i++) { tGbx/$Y
temp = data; voTP,R[}85
} [f[Wz{Q#Y
for (j = 1; j <= r - mid; j++) { M"qS#*{
temp[r - j + 1] = data[j + mid]; T5I#7LN#
} a<E9@
int a = temp[l]; P3Vh|<'7
int b = temp[r]; -yBj7F|
for (i = l, j = r, k = l; k <= r; k++) { ^-|~c`&}B
if (a < b) { ^|hVFM2
data[k] = temp[i++]; SkCux
a = temp; pp7 $Q>6
} else { [gZR}E
data[k] = temp[j--]; &#gh :5
b = temp[j]; c^puz2
} &"27U
} _V0%JE'
} D:z_FNN
:V@)A/}uk
/** PDz:x4A
* @param data UlNV%34"
* @param l PyK!Cyq
* @param i \IudS{ .?;
*/ M`@ASL:u
private void insertSort(int[] data, int start, int len) { Xh3b=i|K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z}7}D!
} hn/yX|4c(
} &@BAVc z
} dD~H ft
} f5{|_]q]
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堆排序： WiQVZ{
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package org.rut.util.algorithm.support; 3p?nQ O)L
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import org.rut.util.algorithm.SortUtil; [?qzMFb
}QQ 7jE
/** `R7dn/
* @author treeroot X?&{< vz
* @since 2006-2-2 _6`GHx
* @version 1.0 MA}}w&
*/ >LN*3&W
public class HeapSort implements SortUtil.Sort{ ._<, Eodv
6X?:mn'%QF
/* (non-Javadoc) D&G?Klq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uq{$j5p8
*/ @#-\BQ;
public void sort(int[] data) { qdmAkYUC
MaxHeap h=new MaxHeap(); :*DWL!a
h.init(data); FZZO-,xa
for(int i=0;i h.remove(); P>_9>k@;Q
System.arraycopy(h.queue,1,data,0,data.length); q@;1{
} y65lbl%Zn
h+&iWb3;
private static class MaxHeap{ \7#w@3*
^e;9_(
void init(int[] data){ V8&'dhuG
this.queue=new int[data.length+1]; Qb55q`'z
for(int i=0;i queue[++size]=data; 4~ L1~Gk
fixUp(size); . &`YlK
} >}2 ,2
} /lPnf7
=PNkzFUo
private int size=0; l?V#;
#b:YY^{g_
private int[] queue; gu~R4@3
B.;@i;7L
public int get() { 3^-R_
return queue[1]; ocMTTVo
} W=LJhCpRHj
yHlQKI
public void remove() { 11Qi _T\
SortUtil.swap(queue,1,size--); pzUr9
fixDown(1); .X"&kO>G
} fkImX:|q
file://fixdown G51-CLM,
private void fixDown(int k) { 7/k7V)
int j; /"m#mhL
while ((j = k << 1) <= size) { %g89eaEZ
if (j < size %26amp;%26amp; queue[j] j++; B!8X?8D
if (queue[k]>queue[j]) file://不用交换 8faT@J'e;
break; 2QEH!)lvr
SortUtil.swap(queue,j,k); 2Oyw#1tdn
k = j; \/gf_R_GN
} 05\0g9
} 84reyA
private void fixUp(int k) { .3XiL=^~Qp
while (k > 1) { rnp; R
int j = k >> 1; /0Qo(
if (queue[j]>queue[k]) *O@Zn
break; 4,h)<(d{
SortUtil.swap(queue,j,k); 8;c\}D
k = j; Qp)?wny4
} |`Yn'Mj8rm
} %zRuIDmv
"UhE'$)
} A #m_w*
N;BuBm5K
} 1>Vq<z
v6Y[_1
SortUtil： rz-61A) _
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package org.rut.util.algorithm; Nq$o{<1
`.3.n8V
import org.rut.util.algorithm.support.BubbleSort; &y|PseH"
import org.rut.util.algorithm.support.HeapSort; 8g-Z~~0W1
import org.rut.util.algorithm.support.ImprovedMergeSort; v<)&JlR
import org.rut.util.algorithm.support.ImprovedQuickSort; C.LAr~P
import org.rut.util.algorithm.support.InsertSort; U 0~BcFpD
import org.rut.util.algorithm.support.MergeSort; {D(l#;,iX2
import org.rut.util.algorithm.support.QuickSort; Qt_KUtD
import org.rut.util.algorithm.support.SelectionSort; ad47 42
import org.rut.util.algorithm.support.ShellSort; Tz.okCo]z
j)@{_tv6;
/** ;;XY&J
* @author treeroot bwP@}(K
* @since 2006-2-2 s|c}9/Xe)
* @version 1.0 OpU9:^r
*/ s'l|Ii
public class SortUtil { \w1',"l`
public final static int INSERT = 1; &+ PVY>q
public final static int BUBBLE = 2; u*uHdV5
public final static int SELECTION = 3; dn?'06TD
public final static int SHELL = 4; a.JjbFL
public final static int QUICK = 5; |22vNt_
public final static int IMPROVED_QUICK = 6; `'EG7
public final static int MERGE = 7; qdKqc,R1{
public final static int IMPROVED_MERGE = 8; 3XQe? 2:<
public final static int HEAP = 9; f#!nj]}#
=5fY3%^b{
public static void sort(int[] data) { ht>/7.p]
sort(data, IMPROVED_QUICK); x>BFK@#
} )b=vBs`%
private static String[] name={ s6(md<r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _/cX!/"
}; QlR~rFs9t
j%Z5[{!/,X
private static Sort[] impl=new Sort[]{ C2=PGq
new InsertSort(), iQG]v[$
new BubbleSort(), GBR$k P
new SelectionSort(), B"#pvJN
new ShellSort(), h)j#?\KYm9
new QuickSort(), f?eq-/UR
new ImprovedQuickSort(), w2/3[VZ}l
new MergeSort(), )K$xu(/K
new ImprovedMergeSort(), hu"-dT;4]
new HeapSort() YPq:z"`-y4
}; &(Hw:W9
/-^J0f+l3
public static String toString(int algorithm){ s"w^E\>6
return name[algorithm-1]; GE=S.P;
} @"/H er
On!+7is'
public static void sort(int[] data, int algorithm) { a MFUj+^
impl[algorithm-1].sort(data); kRbJK
} p}/D{|xO
aUc#,t;Qd
public static interface Sort { "-MB U
public void sort(int[] data); 4^nHq 4_
} (e!Yu#-
SAf)#HXa
public static void swap(int[] data, int i, int j) { /n>vPJvz
int temp = data; G973n
data = data[j]; n<> ^cD
data[j] = temp; #DJZ42
} T<Qa`|5>
} v''J@F7