[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; \} P}H
} OT\[qaK
int i1=l; zT`LPs6T
int i2=mid+1; l^WFMeMD3a
for(int cur=l;cur<=r;cur++){ ,B h[jb`y
if(i1==mid+1) )#M*@e$k
data[cur]=temp[i2++]; @tRq(*(/:
else if(i2>r) 2U)H2%
data[cur]=temp[i1++]; k g0Z(T:&8
else if(temp[i1] data[cur]=temp[i1++]; .pr- ^
else ,z<\Z!+=
data[cur]=temp[i2++]; 7[ *,t
} \c_1uDRoUn
} ZSU;>&>%v
qbFzA i
} g_5:o 3s
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改进后的归并排序: rG}o!I`z
zf4@:GM`
package org.rut.util.algorithm.support; &=xm>;`3
}`\+_@w
import org.rut.util.algorithm.SortUtil; gNo.&G [
owJPEx
/** }I9\=jT
* @author treeroot $+R0RqV$V~
* @since 2006-2-2 ie=tM'fb
* @version 1.0 iw12x:
*/ 7P.C~,+D%P
public class ImprovedMergeSort implements SortUtil.Sort { YSs9BF:a
$:t;WXc.<
private static final int THRESHOLD = 10; r,EIOcz:
X-e)w
/* Z~9\7QJn
* (non-Javadoc) |*e >hk
* %, XyhS5[o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yv[s)c}
*/ ^kzw/.I{
public void sort(int[] data) { Cn[`]
int[] temp=new int[data.length]; U8\[8~Xftn
mergeSort(data,temp,0,data.length-1); ,ZC^,Vq
} eICk}gfun
2~K.m@U}!Z
private void mergeSort(int[] data, int[] temp, int l, int r) { K9;pX2^z9
int i, j, k; Sz.jv#Y
int mid = (l + r) / 2; =pF 6
if (l == r) #,0%g1
return; .UU BAyjm
if ((mid - l) >= THRESHOLD) oZA?}#DRl
mergeSort(data, temp, l, mid); '/Hx0]V
else ix=HLF-0zC
insertSort(data, l, mid - l + 1); !/BXMj,=
if ((r - mid) > THRESHOLD) ezY _7
mergeSort(data, temp, mid + 1, r); "'~'xaU!=a
else JD^(L~n]
insertSort(data, mid + 1, r - mid); '@3hU|jO!
wh<+.Zp
for (i = l; i <= mid; i++) { pBG(%3PpW
temp = data; `sAz1/N
} ZYos.ay
for (j = 1; j <= r - mid; j++) { "Rf8#\Y/<
temp[r - j + 1] = data[j + mid]; 2fu|X#R
} |nk&ir6
int a = temp[l]; AL>*Vj2h/n
int b = temp[r]; !=V>DgmW
for (i = l, j = r, k = l; k <= r; k++) { [ft#zxCJ
if (a < b) { ,q]Wi#
data[k] = temp[i++]; S2HGf~rE
a = temp; Ayadvi(@P
} else { "~jt0pp
data[k] = temp[j--]; .#2YJ~
b = temp[j]; k`F$aQV9`
} Q?B5@J
} )F,H(LblH
} jV;&*4if
!i&^H,
/** <iajtq<Z
* @param data ek1YaE
* @param l q.`+d[Q2
* @param i 4=9To|U*
*/ Ix93/FAn
private void insertSort(int[] data, int start, int len) { qrsPY d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BQ2EDy=}6
} <]r.wn=}M
} cor?#
} x JQde4
} }eXzs_
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堆排序： j{?,nJdQ
6kK\nZ$o$
package org.rut.util.algorithm.support; Xm8 1axyf
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import org.rut.util.algorithm.SortUtil; kL 6f^MoL
RMMx6L|-:
/** a)$"
* @author treeroot ?%J{1+hY
* @since 2006-2-2 -ve{O-;
* @version 1.0 rhO ]4A
*/ E)DdiB'Rh
public class HeapSort implements SortUtil.Sort{ zRbooo{N
JV=d!Gi[C
/* (non-Javadoc) ^a4y+!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b*LEoQSl0V
*/ >:%i,K*AM
public void sort(int[] data) { M;V (Tf
MaxHeap h=new MaxHeap(); *A':^vgk
h.init(data); 6q RZ#MC
for(int i=0;i h.remove(); I8;pMr6
System.arraycopy(h.queue,1,data,0,data.length); +|Z1U$0g
} GJ edW
~'2)E/IeV
private static class MaxHeap{ :?2+'+%'
n8DWA`[ib
void init(int[] data){ 9JV(}v5[
this.queue=new int[data.length+1]; rlqn39
for(int i=0;i queue[++size]=data; =/&ob%J)9]
fixUp(size); 4#MvOjA5[
} dVmI.A'nbp
} PsU.dv[
POwJhT
private int size=0; <cW$ \P}hV
Va/LMw
private int[] queue; T>2)YOx
D$ zKkPYI
public int get() { cobq+Iyu
return queue[1]; +/y 3]}
} M)C.bo{p
}2:/&H'
public void remove() { Y O;N9wu3f
SortUtil.swap(queue,1,size--); Sd'!(M^k3
fixDown(1); dtw1Am#Ci
} ; {$9Sc $
file://fixdown SUsD)!u_H
private void fixDown(int k) { Kf2Ob1
int j; +QT(~<
while ((j = k << 1) <= size) { 3YVG|Bc~_
if (j < size %26amp;%26amp; queue[j] j++; n0q5|ES
if (queue[k]>queue[j]) file://不用交换 r e.chQ6
break; Nlemb:'eP3
SortUtil.swap(queue,j,k); rT9<_<
k = j; uUu]JDdz
} ?W-J2tgss{
} [0U!Y/?6lA
private void fixUp(int k) { ;A7HEx
while (k > 1) { Ymkk"y.w
int j = k >> 1; <yz)iCU?
if (queue[j]>queue[k]) hG .>>
break; "v@$CR9<T
SortUtil.swap(queue,j,k); Z(Fsk4,
k = j; pMnkh}Q#
} h$.y)v
} o<ak&LX`9
e0Cr>I5/e
} 9AK<<Mge.
iD+Q\l;%
} b3N>RPsHS
:M)B#@ c=
SortUtil： 6C@,&2<yK
g N76
package org.rut.util.algorithm; Jy?s'tc
K-(k6<h
import org.rut.util.algorithm.support.BubbleSort; ,6:ya8vB
import org.rut.util.algorithm.support.HeapSort; n=!]!'h\:
import org.rut.util.algorithm.support.ImprovedMergeSort; flDe*F^
import org.rut.util.algorithm.support.ImprovedQuickSort; #D~atgR
import org.rut.util.algorithm.support.InsertSort; (1p[K-J)r
import org.rut.util.algorithm.support.MergeSort; <;<_f U
import org.rut.util.algorithm.support.QuickSort; >U.TkB
import org.rut.util.algorithm.support.SelectionSort; |3`Sd;^;
import org.rut.util.algorithm.support.ShellSort; )/kkvI()l
+U_> Bo
/** S'm&Ll2i@
* @author treeroot G,I[zhX\
* @since 2006-2-2 vJ9Uw
* @version 1.0 LDqq'}qK6
*/ m|!R/,>S4
public class SortUtil { )u?pqFH
public final static int INSERT = 1; +X6xCE
public final static int BUBBLE = 2; P6V_cw$
public final static int SELECTION = 3; 8wz%e(
public final static int SHELL = 4; |fnP@k
public final static int QUICK = 5; >ly`1t1
public final static int IMPROVED_QUICK = 6; }la\?I
public final static int MERGE = 7; m`CcU`s
public final static int IMPROVED_MERGE = 8; 4UD<g+|
public final static int HEAP = 9; :#W40rUb
xp-.,^q\w
public static void sort(int[] data) { p.^glz>B
sort(data, IMPROVED_QUICK); Sn=|Q4ZN
} ={,\6a|]:
private static String[] name={ spter35b[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'X&sH/>r
}; .O!JI"?
;/?M&rX
private static Sort[] impl=new Sort[]{ `(s&H8x#
new InsertSort(), Lt>"R! "x
new BubbleSort(), 6U[`CGL66
new SelectionSort(), )jkX&7x
new ShellSort(), a_Y*pOu
new QuickSort(), @b[{.mU
new ImprovedQuickSort(), ]G.ttfC
new MergeSort(), eaLSq
new ImprovedMergeSort(), ParOWs~W/
new HeapSort() :L gFd
}; MTJ ."e<B
1|$V
public static String toString(int algorithm){ kSx^Uu*
return name[algorithm-1]; }= OI (Wy
} 6UK{0\0
s;V~dxAiv
public static void sort(int[] data, int algorithm) { V|GH4DT=
impl[algorithm-1].sort(data); W" >[sn|
} lnuf_;0
I\djZG$s;N
public static interface Sort { V5w00s5?%
public void sort(int[] data); 'p<lfT
} ,#&\1Vxf
JGQlx-qv
public static void swap(int[] data, int i, int j) { k"_i7
int temp = data; '&/ 35d9|*
data = data[j]; } IJ
data[j] = temp; `o~dQb/k+
} ]WlE9z7:8
} 2fZVBj