[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; C{G;G@/7
} :(K JLa]
int i1=l; 5`6U:MDq
int i2=mid+1; gL&)l!2Y
for(int cur=l;cur<=r;cur++){ e**5_L
if(i1==mid+1) t9.| i H
data[cur]=temp[i2++]; (+nnX7V?I
else if(i2>r) vW0U~(XlN
data[cur]=temp[i1++]; ck$>
else if(temp[i1] data[cur]=temp[i1++]; :7*9W|e
else GF36G?iEi
data[cur]=temp[i2++]; 5,BvT>zFY
} KP`Pzx
} l15Z8hYhj
6H!l>@a7v
} \D-X _.v
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改进后的归并排序: $k+XH+1CW
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package org.rut.util.algorithm.support; @ %o'
mMT\"bb'
import org.rut.util.algorithm.SortUtil; ^e]h\G
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/** I :8s3;
* @author treeroot im9Pjb%
* @since 2006-2-2 NOFH
* @version 1.0 Q]]M;(
*/ vCn~-Q
public class ImprovedMergeSort implements SortUtil.Sort { E;YD5^B
z%nplG'~|
private static final int THRESHOLD = 10; KuF>2KX~Y
lSy_cItF
/* " eS-i@
* (non-Javadoc) (/S6b
* 9RC:-d;;_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FjW%M;H
*/ :|-^et]a8
public void sort(int[] data) { 7HJH9@8V
int[] temp=new int[data.length]; \0)2 u[7
mergeSort(data,temp,0,data.length-1); RLO<5L
} @cQ |`
dFZh1*1
private void mergeSort(int[] data, int[] temp, int l, int r) { M 9 N'Hk=
int i, j, k; EL6<%~,V"I
int mid = (l + r) / 2; _`Dz%(c
if (l == r) \SBAk h
return; (rQ)0g@
if ((mid - l) >= THRESHOLD) `j'gt&
mergeSort(data, temp, l, mid); id)J;!^;J
else keJ-ohv)
insertSort(data, l, mid - l + 1); eI@G B
if ((r - mid) > THRESHOLD) P!!:p2fo
mergeSort(data, temp, mid + 1, r); JHuA}f{2&
else r@Xh8 r;
insertSort(data, mid + 1, r - mid); ;+n25_9
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for (i = l; i <= mid; i++) { (\4YBaGd
temp = data; 0IQ|`C.
} KcM+8W\
for (j = 1; j <= r - mid; j++) { a fB?js6
temp[r - j + 1] = data[j + mid]; {DX1/49
} o}Zl/&(
int a = temp[l]; u"(2Xer
int b = temp[r]; zX8{(
for (i = l, j = r, k = l; k <= r; k++) { zomg$@j
if (a < b) { ;(s.G-9S
data[k] = temp[i++]; }<q=Zq+
a = temp; ,]4.|A_[Rq
} else { U\q?tvn'J
data[k] = temp[j--]; d3p;[;`
b = temp[j]; D7C%Y^K]>E
} ^ lG^.
} E6xWo)`%5s
} hOe$h,E']
qX]ej2
/** _<jccQ
* @param data Mvk#$:8e
* @param l %p};Di[V
* @param i T_qh_L3
*/ u73/#!(1=H
private void insertSort(int[] data, int start, int len) { V6b)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yt;@@xe&
} mZ.E;X& ,*
} t`0(5v
} |RI77b:pX
} 7T?7KS
P#2;1ki>
堆排序： X6oY-4O
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package org.rut.util.algorithm.support; P,n:u'Iwy
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import org.rut.util.algorithm.SortUtil; e(k$k>?
tHo/Vly6Z
/** tUs{/Je
* @author treeroot 0.!Q4bhD
* @since 2006-2-2 5O"wPsl
* @version 1.0 uzLIllVX*
*/ W97 &[([
public class HeapSort implements SortUtil.Sort{ r<.*:]L
=_d-MJy~6
/* (non-Javadoc) C5oIl_t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MP`WU}2
*/ _ 3>|1RB
public void sort(int[] data) { m}nA-*
MaxHeap h=new MaxHeap(); 1I U*:Z;Rz
h.init(data); Alb5#tm:m
for(int i=0;i h.remove(); \4&FW|mx
System.arraycopy(h.queue,1,data,0,data.length); Xu\22/Co
} LWP&Si*j
q8vRUlf
private static class MaxHeap{ (9D,Ukw
.g6(07TyV
void init(int[] data){ Ps{}SZn
this.queue=new int[data.length+1]; N+NS\Y5
for(int i=0;i queue[++size]=data; %i`YJ
fixUp(size); Dz&<6#L<
} q,eXH8 x
} As*59jkB
2BIOA#@t
private int size=0; PRF^<%mkI
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private int[] queue; "G!V?~;
:#p!&Fi
public int get() { tL@m5M%:N2
return queue[1]; N @sVA%L.
} 7ip(-0
g,cl|]/\d
public void remove() { (#k2S-5
SortUtil.swap(queue,1,size--); ^7% KS
fixDown(1); B\Y!5$
} gw9:1S
file://fixdown a0x/?)DO
private void fixDown(int k) { s&*s9F
int j; xo*[ g`N
while ((j = k << 1) <= size) { Fu!sw]6xx
if (j < size %26amp;%26amp; queue[j] j++; CI6qDh6
if (queue[k]>queue[j]) file://不用交换 cX/["AM
break; kP}91kja
SortUtil.swap(queue,j,k); [8.w2\<?
k = j; &\o!-EIK8
} H"> }yD
} Cdd +I5~
private void fixUp(int k) { 5%6r,?/7KM
while (k > 1) { lGP'OY"Q
int j = k >> 1; UBxQ4)%
if (queue[j]>queue[k]) !'EE8Tp~F
break; $:MO/Suz{
SortUtil.swap(queue,j,k); B%Spmx8
k = j; YG6Kvc6T
} (eAh8^)
} UZ+FV;<
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} JMq00_
Px))O&w{
} A">A@`}
-!]dU`:(X
SortUtil： nY<hfqof
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package org.rut.util.algorithm; nfMQ3KP
8"g.Z*
import org.rut.util.algorithm.support.BubbleSort; e RjpR?!\
import org.rut.util.algorithm.support.HeapSort; )v67wn*1A
import org.rut.util.algorithm.support.ImprovedMergeSort; OVm $
import org.rut.util.algorithm.support.ImprovedQuickSort; pJE317 p'
import org.rut.util.algorithm.support.InsertSort; U ]6Hml;l
import org.rut.util.algorithm.support.MergeSort; yegTKoY
import org.rut.util.algorithm.support.QuickSort; B[0XzV]Z
import org.rut.util.algorithm.support.SelectionSort; %%w]-`^h,
import org.rut.util.algorithm.support.ShellSort; glppb$oB\
G&Sp }
/** RT)*H>|
* @author treeroot ' cl&S:
* @since 2006-2-2 5? s$(Lt~
* @version 1.0 V/G'{ q
*/ nEM>*;iE
public class SortUtil { vWwnC)5
public final static int INSERT = 1; fH7o,U|
public final static int BUBBLE = 2; uFT&r|
public final static int SELECTION = 3; \i=,[8t[r
public final static int SHELL = 4; O`hOVHDQ
public final static int QUICK = 5; ymBevL
public final static int IMPROVED_QUICK = 6; ``A=p<W
public final static int MERGE = 7; rsR0V+(W
public final static int IMPROVED_MERGE = 8; Osdw\NNH~M
public final static int HEAP = 9; ?b~Vuo
j9za)G-J
public static void sort(int[] data) { Xo*=iD$Jys
sort(data, IMPROVED_QUICK); 1v4(
} lc=C
private static String[] name={ DT@6Q.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \@4_l?M
}; 5"5D(
( {H5k''
private static Sort[] impl=new Sort[]{ p_jDnb#
new InsertSort(), !ldb_*)h
new BubbleSort(), 451r!U1Z
new SelectionSort(), 4l$(#NB<
new ShellSort(), gC#PqK~
new QuickSort(), 'Z+~G
new ImprovedQuickSort(), z2&SZ.mk
new MergeSort(), +?~'K&@
new ImprovedMergeSort(), u4=j!Zb8}
new HeapSort() |wZ8O}O{E
}; F}A@H<?
pCNihZ~
public static String toString(int algorithm){ #"a?3!wr
return name[algorithm-1]; H85HL-{
} H\2+cAFN#
%zs 1v]
public static void sort(int[] data, int algorithm) { ` =!&9o
impl[algorithm-1].sort(data); z$E+xZ
} pI |;
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public static interface Sort { Mrp'wF D
public void sort(int[] data); 8Z!+1b
} k|,pj^
2@o_7w98
public static void swap(int[] data, int i, int j) { vS:%(Y"!<
int temp = data; ;PJWd|3
data = data[j]; 0sRby!
data[j] = temp; 4?X#d)L(
} . oUaq|O
} *tjE#TW