[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; JNJ6HyCU
} +Z86Qz_
int i1=l; ,'9R/7%s
int i2=mid+1; 4HX;9HPHE<
for(int cur=l;cur<=r;cur++){ {^^LeUd#V
if(i1==mid+1) !(viXV5
data[cur]=temp[i2++]; K5\l (BB
else if(i2>r) UO!} 0'
data[cur]=temp[i1++]; I0=L_&`)
else if(temp[i1] data[cur]=temp[i1++]; t}?-ao
else N 7Y X
data[cur]=temp[i2++]; Zy8tI#
} U~t!
} ]VE3u_kR
o~q.j_Sa
} s.n:;8RibP
qDz[=6BF
改进后的归并排序: x;-D}#
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package org.rut.util.algorithm.support; !c-MC|
j]]5&u/l
import org.rut.util.algorithm.SortUtil; n2Mpo\2
pG"hZB3)
/** 7Cbr'!E\_V
* @author treeroot J#t8xL
* @since 2006-2-2 $b2~H+u(
* @version 1.0 T!HAE#xC
*/ 5,V*aP
public class ImprovedMergeSort implements SortUtil.Sort { "r3h+(5
Y6d~hLC
private static final int THRESHOLD = 10; v\qyDZVV
&0"*.:J9
/* &^uaoB0
* (non-Javadoc) G;ZN>8NB
* [McqwU/Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a"T+CA
*/ LP'q$iB!
public void sort(int[] data) { ^N 4Y*NtV7
int[] temp=new int[data.length]; H\N}0^ea
mergeSort(data,temp,0,data.length-1); x K\i&A
} w^YXnLLJG
Wg,@S*x(
private void mergeSort(int[] data, int[] temp, int l, int r) { d6-q"
int i, j, k; Q2* 8c$
int mid = (l + r) / 2; pSIXv%1J
if (l == r) %L7DC`
return; SW+;%+`
if ((mid - l) >= THRESHOLD) +aPe)U<t
mergeSort(data, temp, l, mid); N'$P( bx
else 5MZv!N
insertSort(data, l, mid - l + 1); UvB\kIH
if ((r - mid) > THRESHOLD) ]#rV]As
mergeSort(data, temp, mid + 1, r); E}a.qM'
else 4^4T#f2=e
insertSort(data, mid + 1, r - mid); B4+c3M\$V
ua &uR7
for (i = l; i <= mid; i++) { 1/qD5 *`Y
temp = data; 8ph1xQ'
} pY&dw4V
for (j = 1; j <= r - mid; j++) { ?hR0 MnP
temp[r - j + 1] = data[j + mid]; -vk/z+-^!
} ,# .12Q!
int a = temp[l]; JP {`^c
int b = temp[r]; jUR* |
for (i = l, j = r, k = l; k <= r; k++) { 6c/0OM#
if (a < b) { Cw kQhj?
data[k] = temp[i++]; LTH,a?lD
a = temp; X*d!A >s
} else { Aw4)=-LKO
data[k] = temp[j--]; x_?K6[G&}
b = temp[j]; ~i'!;'-_}
} WX_g
} HU4h.Lm
} u|u)8;'9(
_v,Wl/YAp
/** 3webAaO
* @param data $AMcU5^b7
* @param l M(C}2.20
* @param i )`\Q/TMl5
*/ G{Ju2HY
private void insertSort(int[] data, int start, int len) { 0Q,Tcj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gSyBoY
} $#W^JWN1
} TlX:05/V8
} [Fk|m1i!
} B4+u/hkbh?
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堆排序： p|a`Q5z!
I3T;|;P7
package org.rut.util.algorithm.support; DW:\6k
ba ,n/yH
import org.rut.util.algorithm.SortUtil; p} eO
KZ^>_K&
/** g/P1lQ)
* @author treeroot *`/4KMrq
* @since 2006-2-2 \9od*y
* @version 1.0 b'R]DS{8
*/ _+7P"B|\
public class HeapSort implements SortUtil.Sort{ mL'A$BR`
QyZ'%T5J
/* (non-Javadoc) XH/!A`ZK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D@[#7:rHL
*/ -HuIz6
public void sort(int[] data) { HJpx,NU'
MaxHeap h=new MaxHeap(); (dO0`wfM
h.init(data); yGC HWP
for(int i=0;i h.remove(); }NdLd!
System.arraycopy(h.queue,1,data,0,data.length); |o(te
} f.oY:3h:
aM,g@'.=
private static class MaxHeap{ 2~r2ErtS
v~._]f$:
void init(int[] data){ s=E6HP@q
this.queue=new int[data.length+1]; K>XZrt
for(int i=0;i queue[++size]=data; J#iuF'%Ds
fixUp(size); EUH9R8)
} w Bm4~~_
} p}wysVB
X(DP=C}v9
private int size=0; "@5{=
`Jj b4]
private int[] queue; L5 Ai
dWwb}r(ky
public int get() { fLSDt(c',
return queue[1]; d& v 7l
} r(wtuD23q
Zc&pJP+M'U
public void remove() { |gINB3L
SortUtil.swap(queue,1,size--); qxZf!NX5
fixDown(1); np}0OX
} 8+(wAbp
file://fixdown Tgi7RAY
private void fixDown(int k) { 5N;xo??
int j; WUQa2$.
while ((j = k << 1) <= size) { \X]I: 0^j
if (j < size %26amp;%26amp; queue[j] j++; }20tdD ~
if (queue[k]>queue[j]) file://不用交换 2@HmZ!|Q
break; O]F(vHK\
SortUtil.swap(queue,j,k); +x4*T
k = j; 4ISIg\:c*
} [kgCB7.V
} H&k&mRi
private void fixUp(int k) { G'nSnw
while (k > 1) { 0XyPG
int j = k >> 1; [E2".F3
if (queue[j]>queue[k]) Zny9TP
break; {%,4P_m
SortUtil.swap(queue,j,k); PtL8Kd0`C
k = j; .uN(44^+x
} uLI;_,/:
} JZ-64OT
?"?AH/ED
} 'C:i5?zh(q
Rx.5;2m
} h_\W7xt
7W&XcF
SortUtil： )RWukr+
UKB/>:R
package org.rut.util.algorithm; +9<:z\B|
9uX15a
import org.rut.util.algorithm.support.BubbleSort; ]Al)>
import org.rut.util.algorithm.support.HeapSort; |B^Picu
import org.rut.util.algorithm.support.ImprovedMergeSort; ke/4l?zs
import org.rut.util.algorithm.support.ImprovedQuickSort; eU]I !pI<
import org.rut.util.algorithm.support.InsertSort; F)/4#[
import org.rut.util.algorithm.support.MergeSort; FS('*w&bP
import org.rut.util.algorithm.support.QuickSort; <5ULu(b&$
import org.rut.util.algorithm.support.SelectionSort; 7v.O Lp
import org.rut.util.algorithm.support.ShellSort; evVxzU&
~Q]::
/** 9c{ ~$zJW
* @author treeroot o{mVXidE
* @since 2006-2-2 ^b=;
* @version 1.0 lx?v .:zl\
*/ c+whpQ=01
public class SortUtil { wp:Zur5Y
public final static int INSERT = 1; 65mfq&"P?
public final static int BUBBLE = 2; "Z dI~
public final static int SELECTION = 3; TKEcbGhy
public final static int SHELL = 4; OsYZa`$,
public final static int QUICK = 5; ps/|^8aGZ
public final static int IMPROVED_QUICK = 6; C!^;%VQ}d
public final static int MERGE = 7; /Vx EqIK
public final static int IMPROVED_MERGE = 8; AB<bW3qf(
public final static int HEAP = 9; N\CHIsVm>
E^pn-rB
public static void sort(int[] data) { AOTtAV_e
sort(data, IMPROVED_QUICK); y4&x`|tv
} m-cw5lW
private static String[] name={ moMNd(p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jpMMnEVj6P
}; 7+6I~&x!Lz
7WmY:g#s
private static Sort[] impl=new Sort[]{ s]D1s%Mx
new InsertSort(), k6\&[BQs
new BubbleSort(), Ms+SJ5Lg
new SelectionSort(), !rG-[7K
new ShellSort(), 6eNBldP!
new QuickSort(), bp}]'NA
new ImprovedQuickSort(), N5xI;UV9'
new MergeSort(), }C~9?Y
new ImprovedMergeSort(), rvb@4-i>iI
new HeapSort() |H5$VSw
}; ("<4Ry.u
Fa#5a'}I
public static String toString(int algorithm){ $lUz!mjG
return name[algorithm-1]; #wh[F"zX
} h]VC<BD6S
xZQyH
public static void sort(int[] data, int algorithm) { OE}c$!@
impl[algorithm-1].sort(data); ,wyEo>>4)
} wDBU+Z
m?;/H
public static interface Sort { b%VZPKA;
public void sort(int[] data); ,}Im^~5
} -KqMSf&9
'loko#6
public static void swap(int[] data, int i, int j) { /c7jL4oD
int temp = data; (^<skx>
data = data[j]; =#&+w[4?&.
data[j] = temp; N)KN!!
} T@n};,SQ
} ;YBk.} %