[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; i&JpM]N
} +vf:z?I8
int i1=l; YUCC*t
int i2=mid+1; JRq3>P
for(int cur=l;cur<=r;cur++){ >zQNHSi
if(i1==mid+1) Uls+n@\!
data[cur]=temp[i2++]; DE%fF,Hk3
else if(i2>r) VrVDm*AGQ
data[cur]=temp[i1++]; @a0Q0M
else if(temp[i1] data[cur]=temp[i1++]; 975 _d_U
else xpAok]
data[cur]=temp[i2++]; ^CUSlnB\(
} )#a7'Ba
} }B`Ku5 M
*,17x`1e
} t ^m~
>Co)2d]
改进后的归并排序: "CMucK
c+8V|'4
package org.rut.util.algorithm.support; _C20 +PMO
ul$,q05nb
import org.rut.util.algorithm.SortUtil; 6(Vhtr2(*
J smB^
/** ;`+`#h3-V
* @author treeroot m^Glc?g<
* @since 2006-2-2 Ls1B\Aw_
* @version 1.0 _B3zRO
*/ TKo<~?
public class ImprovedMergeSort implements SortUtil.Sort { #ra*f~G
+Juh:1H
private static final int THRESHOLD = 10; 6|5H=*)DH
`^x9(i/NE
/* H'Nq#K
* (non-Javadoc) -G-3q6A
* tF^g<)S;t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eQ;Q4
*/ gX^ PSsp
public void sort(int[] data) { %&h c"7/k
int[] temp=new int[data.length]; J#''q"rZ
mergeSort(data,temp,0,data.length-1); n}JPYu
} 9Sz7\W0
Vc _:*
private void mergeSort(int[] data, int[] temp, int l, int r) { A@2Bs5F
int i, j, k; e\D| o?v
int mid = (l + r) / 2; U7h(-dV
if (l == r) ?`H[u7*%
return; P#MK
if ((mid - l) >= THRESHOLD) &<Zdyf?[Ou
mergeSort(data, temp, l, mid); ~>g+2]Bn>$
else -9d%+O~v6~
insertSort(data, l, mid - l + 1); &?y7I Pp
if ((r - mid) > THRESHOLD) RkA8
mergeSort(data, temp, mid + 1, r); WI&lj<*
else &iBNO,v
insertSort(data, mid + 1, r - mid); O%&cE*eX
JRY_nX
for (i = l; i <= mid; i++) { Zj!Abji=O
temp = data; G>K@AW#
} APq7 f8t
for (j = 1; j <= r - mid; j++) { Q+'nw9:;T
temp[r - j + 1] = data[j + mid]; UV@0gdy[
} G?xJv`"9iC
int a = temp[l]; Bd# TUy
int b = temp[r]; |55dbL$w
for (i = l, j = r, k = l; k <= r; k++) { JNi=`X&A
if (a < b) { "}zt`3
data[k] = temp[i++]; 9->q|E4
a = temp; y`So&:1
} else { m*Cu-6&qd
data[k] = temp[j--]; o2naVxetE
b = temp[j]; Skxd<gv
} $(rc/h0/E
} 2+Yb 7 uI,
} e<"/'Ql!k
59lj7
/** sJU`u'w
* @param data qybxXK:
* @param l ^2C>L}
* @param i jn=:G+0
*/ Ilq=wPD}j
private void insertSort(int[] data, int start, int len) { R5(T([w'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [E|uY]DR
} fd1C{^c
} y}"7e)|t%
} 5JSrrpGr
} x)oRSsv!Tr
:FHA]oec1
堆排序： Ej"u1F14J
!YE zFU`L
package org.rut.util.algorithm.support; # yN*',I&
!%[S49s
import org.rut.util.algorithm.SortUtil; ].mqxf
o35fifM`
/** 6Hf,6>
* @author treeroot ,b|-rU\
* @since 2006-2-2 Ch5+N6c^
* @version 1.0 :NE/Ddgc'
*/ f<=Fe:1.
public class HeapSort implements SortUtil.Sort{ ^$NJD
6R4<J%$P
/* (non-Javadoc) ^R~~L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H=~9CJ+tc
*/ (MLhaux-
public void sort(int[] data) { +@:L|uFU
MaxHeap h=new MaxHeap(); #fDs[
h.init(data); ?9xu{B>6
for(int i=0;i h.remove(); 3WUH~l{UJ
System.arraycopy(h.queue,1,data,0,data.length); 5/@UVY9_
} ~ap2m
H"Dn]$Q\Z
private static class MaxHeap{ +B"0{>n}F
lr3mE
void init(int[] data){ d%ME@6K)
this.queue=new int[data.length+1]; Hj6'pJ4
for(int i=0;i queue[++size]=data; ue{xnjw>U
fixUp(size); ,={t8lN
} {' 5qv@3
} m;,xmEp
7wVH8^|
private int size=0; 5kMWW*Xtf
.F2:!h$
private int[] queue; /,tAoa~FA
(S/F)?
public int get() { 'jfRt-_-
return queue[1]; j-b*C2l
} &c%Y<1e`%
|yY`s6Uq
public void remove() { NNkP\oh\
SortUtil.swap(queue,1,size--); uY#TEjGh]
fixDown(1); ;_+uSalt
} {hdPhL
file://fixdown ~Xv=9@,h
private void fixDown(int k) { `dW]4>`O
int j; w0J|u'H
while ((j = k << 1) <= size) { \".^K5Pm
if (j < size %26amp;%26amp; queue[j] j++; E>uVofhml
if (queue[k]>queue[j]) file://不用交换 'Jj=RAV`
break; z5 m>H;P
SortUtil.swap(queue,j,k); wkb$^mU
k = j; A9:NKY{z
} uGVy6,
} \RG!@$i
private void fixUp(int k) { 9A$m$
while (k > 1) { KZ:hKY@q
int j = k >> 1; n/Dp"4H%q
if (queue[j]>queue[k]) /-M@[p&
break; ,kM)7!]N
SortUtil.swap(queue,j,k); /X*oS&-M
k = j; zfI}Q}p
} Acm<-de
} } cNW^4F
~Y!kB:D5;~
} MuI2?:~:*4
.*/Fucr
} {2KFD\i\
%D=]ZV](
SortUtil： Dr#c)P~Wd
8Ogv9
package org.rut.util.algorithm; F-gE<<
=;L*<I
import org.rut.util.algorithm.support.BubbleSort; uGP(R=H
import org.rut.util.algorithm.support.HeapSort; rofNZ;nu
import org.rut.util.algorithm.support.ImprovedMergeSort; q_fam,9
import org.rut.util.algorithm.support.ImprovedQuickSort; }JgYCsF/f
import org.rut.util.algorithm.support.InsertSort; 8|g<X1H{M
import org.rut.util.algorithm.support.MergeSort; 8y2+&#$
import org.rut.util.algorithm.support.QuickSort; dK9Zg,DZL
import org.rut.util.algorithm.support.SelectionSort; kLP0{A
import org.rut.util.algorithm.support.ShellSort; UQ?%|y*Kc
Xrqx\X
/** A[N{
* @author treeroot 0 p uY"[c
* @since 2006-2-2 HIvZQQW|
* @version 1.0 Xyx"A(v^l
*/ ~Ci{3j :]
public class SortUtil { iz[gHB
public final static int INSERT = 1; MgMD\
public final static int BUBBLE = 2; lS5ny
public final static int SELECTION = 3; <i. apBH
public final static int SHELL = 4; {S.>BXX
public final static int QUICK = 5; V"KS[>>f
public final static int IMPROVED_QUICK = 6; |NFZ(6vNh
public final static int MERGE = 7; Ctu?o+^;z
public final static int IMPROVED_MERGE = 8; ~qP[eWe
public final static int HEAP = 9; >{zk qvsQ&
x!<yT?A
public static void sort(int[] data) { |V,<+BEi
sort(data, IMPROVED_QUICK); *f+: <=i
} hGTV;eU
private static String[] name={ *C|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^s:y/Kd
}; >l5$9wO
6<'K~1do:
private static Sort[] impl=new Sort[]{ iw?I
new InsertSort(), Tl("IhkC
new BubbleSort(), >bo'Y9C
new SelectionSort(), _GYMPq\%L#
new ShellSort(), 2-+f1,
new QuickSort(), aAt>QxGQW
new ImprovedQuickSort(), qL /7^)(
new MergeSort(), z?]G3$i(
new ImprovedMergeSort(), -0uV z)
new HeapSort() 2@j";+
}; 7Ke&0eAw
Jf;?XP]z
public static String toString(int algorithm){ ){;02^tX
return name[algorithm-1]; kL*0M<0 (
} qdD)e$XW,
Q /x8 #X
public static void sort(int[] data, int algorithm) { ~aK?cP
impl[algorithm-1].sort(data); qt e>r
} qOhO qV
{p<Zbm.
public static interface Sort { ()T[$.(
public void sort(int[] data); G=9d&N
} a:STQk V
SI:ifR&T
public static void swap(int[] data, int i, int j) { 2][DZl
int temp = data; &"Ux6mF-"
data = data[j]; :;]Oc
data[j] = temp; P\2M[Gu(Q
} #;KsJb)N.
} $14:(<