[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; 0Ida]H
} d@4!^vD;
int i1=l; <'_GQM`G
int i2=mid+1; ejY5n2V#=
for(int cur=l;cur<=r;cur++){ RT"2Us]*
if(i1==mid+1) f4T0Y["QA
data[cur]=temp[i2++]; %pkq ?9
else if(i2>r) I?g__u=n~
data[cur]=temp[i1++]; @qy*R'+
else if(temp[i1] data[cur]=temp[i1++]; b[;3KmUB
else ZC*d^n]x.
data[cur]=temp[i2++]; I<K/d
} `>EvT7u
} 5 hadA>d
U(=9&c@]
} O9X:1>a@i
D>e\OfTR:
改进后的归并排序: C'2 =0oou
Pq>[q?>?
package org.rut.util.algorithm.support; ~+ wamX3
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import org.rut.util.algorithm.SortUtil; U hhmG+
XWQ0V
/** o=# [^Zv
* @author treeroot }cej5/*
* @since 2006-2-2 b]&zDo|8
* @version 1.0 ?mR[A`J58
*/ mh7sY;SvM
public class ImprovedMergeSort implements SortUtil.Sort { )9*3^v
gNN" H#=2
private static final int THRESHOLD = 10; sg"D;b:X
)$h9Y
/* XJ~l5}y ]
* (non-Javadoc) 3t{leuO'
* lO:{tV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &N_c-@2O
*/ K!c@aD:#
public void sort(int[] data) { |kNGpwpI
int[] temp=new int[data.length]; ls7A5 <
mergeSort(data,temp,0,data.length-1); U.7y8#qf3R
} `N.$LY;8
5vF}F^
private void mergeSort(int[] data, int[] temp, int l, int r) { 9r+O!kF(
int i, j, k; ~)a;59<$
int mid = (l + r) / 2; 0s9z @>2
if (l == r) ~P#zhHw
return; <N=p:e,aN,
if ((mid - l) >= THRESHOLD) `s>=Sn&UP
mergeSort(data, temp, l, mid); ZHF(q6T
else iq uTT~
insertSort(data, l, mid - l + 1); Rw\C0'
if ((r - mid) > THRESHOLD) _+04M)q0
mergeSort(data, temp, mid + 1, r); }t%>_
else _6UAeZ*M
insertSort(data, mid + 1, r - mid); <I%9O:R
+aw>p_\
for (i = l; i <= mid; i++) { wV[V#KpX8-
temp = data; k\#-6evT
} .83v~{n
for (j = 1; j <= r - mid; j++) { -y*_.Ws9
temp[r - j + 1] = data[j + mid]; RjGB#AK
} :-\ yy
int a = temp[l]; %^5@z1d,
int b = temp[r]; >`<2}Me6
for (i = l, j = r, k = l; k <= r; k++) { Fv);5LD
if (a < b) { ^_KD&%M6
data[k] = temp[i++]; 1:xnD
a = temp; %FyygTb;S
} else { !ObE{2Enf
data[k] = temp[j--]; zYG,x*IH
b = temp[j]; "8muMa8Q%
} s9rtXBJP
} 90qj6.SQ
} yLz,V}
)Bn>/-
/** \;*}zX
* @param data ^~6]0$yJ
* @param l pP0Vg'V
* @param i uB<F.!3
*/ {y:#'n
private void insertSort(int[] data, int start, int len) { p=~h|(M|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l/ rZcf8z
} TwuX-b
} F%#*U82
} !-5S8b
} 3K#mF7)a
_rMT{q3
堆排序： 5':Gu}Vq
8_IOJ]:w
package org.rut.util.algorithm.support; _+*/~E
@v~Pwr!
import org.rut.util.algorithm.SortUtil; |#&V:GZp
YXzZ-28,<
/** (}C^_q:7d
* @author treeroot $,;S\JmWP
* @since 2006-2-2 '>e79f-O)
* @version 1.0 P*SCHe'
*/ (H8C\%g:
public class HeapSort implements SortUtil.Sort{ 1O9p YW5J
qqe2,X?
/* (non-Javadoc) o3F|#op
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ``|gcG
*/ o'eI(@{F=
public void sort(int[] data) { :6W^ S/pf
MaxHeap h=new MaxHeap(); $Pd|6
h.init(data); 9si}WqAw
for(int i=0;i h.remove(); bR'mV-2'
System.arraycopy(h.queue,1,data,0,data.length); w*:GM8=6
} 8jjFC9Cbn0
*"5N>F[L
private static class MaxHeap{ $,KP]~?
mLg{6qm(q
void init(int[] data){ <rB3[IJo
this.queue=new int[data.length+1]; 7!r#(>I6?1
for(int i=0;i queue[++size]=data; ;v1NL@w*
fixUp(size); `c'
} v]:+`dV
} ;+i'0$;*w
l`b1%0y
private int size=0; TX23D)CX
={`CHCI
private int[] queue; BIV<ti$.
Y$`eg|$
public int get() { I7fb}j`/
return queue[1]; *#1y6^
} fVDDYo2\
%AG1oWWc>.
public void remove() { #v4LoNm
SortUtil.swap(queue,1,size--); sTtX$&Qu
fixDown(1); )u8*zwq
} 1yBt/U2
file://fixdown ^sifEgG*d
private void fixDown(int k) { Qz@IK:B}
int j; oTCzYY
while ((j = k << 1) <= size) { `/O`OrZ1K
if (j < size %26amp;%26amp; queue[j] j++; Tm)GC_
if (queue[k]>queue[j]) file://不用交换 WR/o @$/
break; T-|9o|~z
SortUtil.swap(queue,j,k); gB>imr#e&
k = j; sno`=+|U]
} pb^,Qvnp
} ]*N:;J
private void fixUp(int k) { 'qL5$zG
while (k > 1) { !K3})& w
int j = k >> 1; OM.k?1%+M
if (queue[j]>queue[k]) p}3NJV
break; .xGo\aD
SortUtil.swap(queue,j,k); c,y|c`T 2
k = j; %MJL5
} bLgL0}=n
} YijMF/Uyb
=)I"wR"v$
} 90/vJN
S!;LF4VA
} B<|VeU
mC i[Ps
SortUtil： .u1X+P7
]~-*hOcQ4
package org.rut.util.algorithm; x\hWyY6J[
'>j<yaD'
import org.rut.util.algorithm.support.BubbleSort; v6s\Z\v)Q`
import org.rut.util.algorithm.support.HeapSort; n/QfdAg
import org.rut.util.algorithm.support.ImprovedMergeSort; q!6|lZB3
import org.rut.util.algorithm.support.ImprovedQuickSort; &]P"48NT
import org.rut.util.algorithm.support.InsertSort; nPcS3!7B#
import org.rut.util.algorithm.support.MergeSort; i"vawxm
import org.rut.util.algorithm.support.QuickSort; 9!9> ?Z
import org.rut.util.algorithm.support.SelectionSort; EM=w?T
import org.rut.util.algorithm.support.ShellSort; 0YzsA#yv
^Q0&.hL@
/** ?Jt$a;
* @author treeroot ha*X6R
* @since 2006-2-2 ~>V-*NT8
* @version 1.0 $<B +K
*/ 1O |V=K
public class SortUtil { |G(1[RNu
public final static int INSERT = 1; ?c!:81+\
public final static int BUBBLE = 2; Dv&>*0B
public final static int SELECTION = 3; qM%O
public final static int SHELL = 4; F4Zn5&.)
public final static int QUICK = 5; i+f7
public final static int IMPROVED_QUICK = 6; ,c>N}*6h=W
public final static int MERGE = 7; CRFCqmevR
public final static int IMPROVED_MERGE = 8; #(C/Cx54
public final static int HEAP = 9; \PpXL*.
7K&}C;+
public static void sort(int[] data) { OL3UgepF
sort(data, IMPROVED_QUICK); E\0X`QeY
} ?O??cjiA@
private static String[] name={ nH@(Y&S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m0|K#^
}; ?^ZXU0IkP
Y\xUT>(J7
private static Sort[] impl=new Sort[]{ x?"#gK`3;
new InsertSort(), nnNv0?>d(
new BubbleSort(), V!4a*,Pz
new SelectionSort(), fb.J$fX
new ShellSort(), f/}
new QuickSort(), @F>F#-2
new ImprovedQuickSort(), 845 W>B
new MergeSort(), ?i~g,P]NK
new ImprovedMergeSort(), YNSyi@
new HeapSort() mOP4z'
}; kbxg_UI;
f~=r*&U
public static String toString(int algorithm){ X7aYpt;
return name[algorithm-1]; I&Jt> O4
} &D]p,
m9$a"$c
public static void sort(int[] data, int algorithm) { )6{< i5nJ\
impl[algorithm-1].sort(data); Nt]qVwUm'Y
} #;[Bl=3(
q-nER<
public static interface Sort { G?`-]FMO
public void sort(int[] data); ;+ azeW^
} 0VN7/=n|
,_jC$
public static void swap(int[] data, int i, int j) { @x1%)1
int temp = data; !Xj#@e
data = data[j]; 22 &'@C>
data[j] = temp; .2.qR,"j
} u-JpI-8h
} #)s!}X^