[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; d.2b7q09
} )V@qH]
int i1=l; '0t j2
int i2=mid+1; ATnD~iACY
for(int cur=l;cur<=r;cur++){ ,<EmuEw |
if(i1==mid+1) "3\RJ?eW:S
data[cur]=temp[i2++]; 7e8hnTzl8<
else if(i2>r) P?9CBhN
data[cur]=temp[i1++]; EHzZ9zH\
else if(temp[i1] data[cur]=temp[i1++]; "VT5WFj
else P*aD2("Z
data[cur]=temp[i2++]; EAY9~b6~c
} {q}:w{x9u
} 3M%EK2,
_KZ(Yq>SdY
} *r-Bt1
}\823U %
改进后的归并排序: +B8Ut{l
vnN_csJ#^
package org.rut.util.algorithm.support; UD9h5PgT
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import org.rut.util.algorithm.SortUtil; e. [+xOu`
aNqVs|H
/** etTuukq_Z
* @author treeroot 50I6:=@\\
* @since 2006-2-2 nn=JM7e\9
* @version 1.0 1Rczf(,aT
*/ =x7ODBYW^
public class ImprovedMergeSort implements SortUtil.Sort { _eO]awsA
[w{ZP4d>
private static final int THRESHOLD = 10; whLske-
qh2.N}lW
/* Ey6K@@%
* (non-Javadoc) qS2%U?S7
* ux=a9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0(i`~g5
*/ [;?^DAnK2
public void sort(int[] data) { I* bjE'
int[] temp=new int[data.length]; 61mQJHl.
mergeSort(data,temp,0,data.length-1); }K*ri
} >#q|Pjv]
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private void mergeSort(int[] data, int[] temp, int l, int r) { {>+$u"*
int i, j, k; %kcg#p+tE
int mid = (l + r) / 2; RU{}qPs?
if (l == r) ;zCHEz
return; TuF:m"4
if ((mid - l) >= THRESHOLD) #-@{rgH
mergeSort(data, temp, l, mid); JfVayI=
else <;XJ::d
insertSort(data, l, mid - l + 1); ]!A;-m
if ((r - mid) > THRESHOLD) K[ \z'9Q
mergeSort(data, temp, mid + 1, r); hV,3xrm?P
else *jJ62-o
insertSort(data, mid + 1, r - mid); VLO>{"{'
kEXcEF_9P
for (i = l; i <= mid; i++) { p0tv@8C>
temp = data; v4v+;[a%
} \;?\@vo<
for (j = 1; j <= r - mid; j++) { t{7l.>kf
temp[r - j + 1] = data[j + mid]; #E ~FF@a
} m_Rgv.gE^
int a = temp[l]; R80R{Ze
int b = temp[r]; )F~_KD)7jJ
for (i = l, j = r, k = l; k <= r; k++) { |.S;z"v![
if (a < b) { [%@zH
data[k] = temp[i++]; cr/|dc'
a = temp; H 0h
} else { ^s?wnEo;j
data[k] = temp[j--]; O[`Ob6Q{F
b = temp[j]; >ciq4H43Q|
} [qXpi'q[
} 7d<v\=J}
} -m@s 9k
1]<!Xuk^f
/** 9F-k:hD |
* @param data W+eN%w5
* @param l ;+jp,( 7
* @param i oF>GWstTR
*/ E??%)q
private void insertSort(int[] data, int start, int len) { C=]3NB>Jc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =;`YtOL
} #<~f~{x
} F9<OKcXH
} Ya_6Zd4O
} roA1=G\Q
.( J/*H
堆排序： 3K{8sFDO
g}D$`Nx:
package org.rut.util.algorithm.support; ~3%3{aa
y8 Nb8m
import org.rut.util.algorithm.SortUtil; _qg6( X
C:K\-P9
/** YNXk32@j@e
* @author treeroot Om^/tp\
* @since 2006-2-2 K+}Z6_:
* @version 1.0 W"*R#:Q
*/ WAa?$"U2
public class HeapSort implements SortUtil.Sort{ Y;w]u_
}-vBRY
/* (non-Javadoc) y(dS1.5F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z~uKT n
*/ br;G5^j3?
public void sort(int[] data) { ]M2<I#hF.
MaxHeap h=new MaxHeap(); ./ :86@O
h.init(data); KRtu@;?
for(int i=0;i h.remove(); i#lo?\PO>
System.arraycopy(h.queue,1,data,0,data.length); ypd?mw&1}
} 4yA`);r62
6+5Catsn
private static class MaxHeap{ Z]Y4NO;
]Rye AJ3
void init(int[] data){ AAW7@\q.
this.queue=new int[data.length+1]; 6:,^CI|@t
for(int i=0;i queue[++size]=data; 2{CSH_"Z7
fixUp(size); 64lEB>VNm
} eTc`FXw`
} ETOc4hMO
hkJZqUA
private int size=0; vo$66A
/4?`F}7)
private int[] queue; /RM-+D:Y
W,~1KUTc
public int get() { s2v*
return queue[1]; b8>9mKs
} Q8x{V_Pot
a%!XLyq
public void remove() { ^{s0d+@{
SortUtil.swap(queue,1,size--); ~Z2eQx jtM
fixDown(1); l:eNu}{&
} C6w{"[Wv=X
file://fixdown f 99PwE(=
private void fixDown(int k) { <<6w9wNon
int j; G!8pF
while ((j = k << 1) <= size) { ?nW#qy!R
if (j < size %26amp;%26amp; queue[j] j++; b0X[x{k"
if (queue[k]>queue[j]) file://不用交换 5B 7*Z
break; ^WD$ gd
SortUtil.swap(queue,j,k); @>5<m'}2
k = j; }^[@m#
} zRu`[b3u<
} dLf8w>i`T
private void fixUp(int k) { tTH%YtG
while (k > 1) { 2-0cB$W+
int j = k >> 1; )^H9C"7T
if (queue[j]>queue[k]) Aa>gN
break; S=p u
SortUtil.swap(queue,j,k); 7Ca\ (82
k = j; cEdJn@ ,
} 'cN#rHPB6
} qJU)d
YSo7~^1W"
} #&83;uys
sK0VT"7K
} F5+_p@!i
gi'agB^
SortUtil： uR@`T18
Qiw4'xQm
package org.rut.util.algorithm; t5X lR]` w
]?(F'&
import org.rut.util.algorithm.support.BubbleSort; n-3j$x1Ne
import org.rut.util.algorithm.support.HeapSort; wG5RN;`V
import org.rut.util.algorithm.support.ImprovedMergeSort; )V3(nZY
import org.rut.util.algorithm.support.ImprovedQuickSort; h(Ed%
import org.rut.util.algorithm.support.InsertSort; 5iddB $
import org.rut.util.algorithm.support.MergeSort; 2nkj;x{H$
import org.rut.util.algorithm.support.QuickSort; EAw#$Aq=
import org.rut.util.algorithm.support.SelectionSort; *t{c}Y&@
import org.rut.util.algorithm.support.ShellSort; ;J-Ogt@d7
Ok~{@\
/** `?^w
* @author treeroot rJZs 5g`
* @since 2006-2-2 ZT8Ji?_n
* @version 1.0 Lzx$"R-
*/ 'S7@+kJ
public class SortUtil { \Z20fh2
public final static int INSERT = 1; F9P0cGDs
public final static int BUBBLE = 2; 4>VZk^%b#
public final static int SELECTION = 3; yVHlT
public final static int SHELL = 4; QX.6~*m1
public final static int QUICK = 5; %K'*P56
public final static int IMPROVED_QUICK = 6; >B/&V|E
public final static int MERGE = 7; 4c[)}8\
public final static int IMPROVED_MERGE = 8; ^>8]3@ Nh
public final static int HEAP = 9; &17,]#3
t"/"Ge#a
public static void sort(int[] data) { Xm:=jQn
sort(data, IMPROVED_QUICK); iWM7,=1+
} c4>sE[]
private static String[] name={ .xkV#ol
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KHecc/,,S
}; 8@yc}~8 *
LQ\ ELJj
private static Sort[] impl=new Sort[]{ VnSj:LUD
new InsertSort(), 4Sstg57x~
new BubbleSort(), 8o7]XZE=)
new SelectionSort(), (1AA;)`Kp
new ShellSort(), Di<J6xu
new QuickSort(), `JWYPsWk
new ImprovedQuickSort(), ]~00=nXFM/
new MergeSort(), Cxk$"_
new ImprovedMergeSort(), }SMJD
new HeapSort() cbCE $
}; NQ!N"C3u
E`uaE=Mdq
public static String toString(int algorithm){ Kwl qi]~
return name[algorithm-1]; @y0bU*v7
} E[3FdX8
Mj B<\g>
public static void sort(int[] data, int algorithm) { )n}]]^Sc
impl[algorithm-1].sort(data); 4ZJT[zi
} )yNw2+ ~5
r` `iC5Ii
public static interface Sort { AqbT{,3yW
public void sort(int[] data); c > mu)('U
} frmqBCVJ:
{8#N7(%z
public static void swap(int[] data, int i, int j) { `+hy#1]
int temp = data; Md>f
data = data[j]; ok3
data[j] = temp; a|P~LMPM
} B2G5hbaA
} Z0"&