[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; +#0~:&!9
} 0('OyH)
int i1=l; aL88E
int i2=mid+1; \s,Iz[0Vfz
for(int cur=l;cur<=r;cur++){ 7@FDBjq
if(i1==mid+1) Kp8fh-4_
data[cur]=temp[i2++]; )V=0IZi
else if(i2>r) V{43HA10b
data[cur]=temp[i1++]; xC<R:"Mn
else if(temp[i1] data[cur]=temp[i1++]; |a%B|CX
else 5i|s>pD4z1
data[cur]=temp[i2++]; ):/,w!1
} ~q*i;*
} PoJmW^:}
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} Nfr:`$k
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改进后的归并排序: Cy`26[E$S
F|,6N/;!W
package org.rut.util.algorithm.support; ldK>HxM%Z
s\6N }[s
import org.rut.util.algorithm.SortUtil; +yGY785b
p=2zS.
/** {W-5:~?"
* @author treeroot Dh2#$[/@1
* @since 2006-2-2 3Hs$]nQ_X
* @version 1.0 DUqJ y*F(
*/ w nWgy4:
public class ImprovedMergeSort implements SortUtil.Sort { B#1:Y;Z
"<qEXX
private static final int THRESHOLD = 10; b9`iZ
o\&~CW~@~
/* `(3SfQ-
* (non-Javadoc) q1STRYb
* aQga3;S!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %?Rs*-F.~1
*/ e]>/H8
public void sort(int[] data) { *vb^N0P
int[] temp=new int[data.length]; n|6?J_{<b>
mergeSort(data,temp,0,data.length-1); 'm[6v}
} 2%5?Fn=
D@#0dDT
private void mergeSort(int[] data, int[] temp, int l, int r) { XjxPIdX_H
int i, j, k; #$FY+`
int mid = (l + r) / 2; n"iNKR>nW
if (l == r) CldDr<k3
return; :VJV5f{
if ((mid - l) >= THRESHOLD) N ,+(>?yE
mergeSort(data, temp, l, mid); * flWL
else r?\|f:M3
insertSort(data, l, mid - l + 1); )AJ=an||5
if ((r - mid) > THRESHOLD) wEE2a56L-
mergeSort(data, temp, mid + 1, r); GYd]5`ri
else EA6t36|TX
insertSort(data, mid + 1, r - mid); +GYS26
W+.{4K
for (i = l; i <= mid; i++) { inZi3@h)T
temp = data; jM]d'E?ZLA
} ALfiR(!
for (j = 1; j <= r - mid; j++) { 3^XVQS***
temp[r - j + 1] = data[j + mid]; ka#K [qI
} t}VwVf<K
int a = temp[l]; 6%E~p0)i%
int b = temp[r]; nx B32
for (i = l, j = r, k = l; k <= r; k++) { Q{[@`bZB
if (a < b) { Lbsr_*4t
data[k] = temp[i++]; 9^au$KoU
a = temp; +>4^mE" \
} else { iTu0T!4F
data[k] = temp[j--]; )%qtE34`
b = temp[j]; ~\[?wN
} p'g^Wh
} %&tb9_T)d
} IO"hF
gJh}CrU-
/** 2 Kla8
* @param data Ssf+b!e]
* @param l MQJ%He"
* @param i 3"Yif
*/ 0yz~W(tsm
private void insertSort(int[] data, int start, int len) { BRa{\R^I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9_UN.]
} +bUW!$G
} -TTs.O8P|<
} x#mtS-sw2Q
} >fH*XP>(
vr4O8#
堆排序： ;%WdvnW
@(>XOj?+
package org.rut.util.algorithm.support; (i]Z|@|)
Tm_8<$ 7
import org.rut.util.algorithm.SortUtil; =JW[pRI5a
AWT"Y4Ie
/** U<[jT=L
* @author treeroot Oc~aW3*A(
* @since 2006-2-2 csDQva\
* @version 1.0 w12}Rn8
*/ y(}Eko4u5
public class HeapSort implements SortUtil.Sort{ ?mU\ N0o
Yb6q))Y
/* (non-Javadoc) kYlg4 .~M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _B[WY
*/ :6D0j
public void sort(int[] data) { L M /Ga
MaxHeap h=new MaxHeap(); Jq)U</
h.init(data); /H)Br~ l
for(int i=0;i h.remove(); {cR=N~_EO
System.arraycopy(h.queue,1,data,0,data.length); Rh<N);Sl7
} +c) TDH
#9:2s$O[x
private static class MaxHeap{ bi$VAYn.^
=EpJZt
void init(int[] data){ 0hwj\{"
this.queue=new int[data.length+1]; |dk[cX>
for(int i=0;i queue[++size]=data; 8W -@N
fixUp(size); 1 i3k
} xA #H0?a]
} k':s =IXW
>f$NzJ}
private int size=0; vq>l>as9O
b\giJ1NJB
private int[] queue; R=M!e<'
/M@PO"
public int get() { :YNp8!?T?
return queue[1]; 56{I`QjX
} 3m=2x5{L
~O03Sit-
public void remove() { v{y{sA
SortUtil.swap(queue,1,size--); J(s;$PG
fixDown(1); 6I>^Pf'ND
} h1f8ktF
file://fixdown 7&+Ys
private void fixDown(int k) { @G*.1;jO
int j; MhxDV d
while ((j = k << 1) <= size) { cAEokP
if (j < size %26amp;%26amp; queue[j] j++; )yj:PY]
if (queue[k]>queue[j]) file://不用交换 J@]k%h
break; w4%AJmt
SortUtil.swap(queue,j,k); B4Lx{uno
k = j; ,S!w'0k|n
} mQr0sI,o]
} 8\# ^k#X
private void fixUp(int k) { 2d`c!
while (k > 1) { @;Y~frT
int j = k >> 1; _u5dC
if (queue[j]>queue[k]) /S~m)$vu
break; %Q~CB7ILK
SortUtil.swap(queue,j,k); }ZzLs/v%X
k = j; Lgi[u"Du
} ]db@RbaH
} kg>>D
o@k84+tn(
} A5nO=
0m)&YFZ[(
} 4l @)K9F
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SortUtil： !p[`IWZ
op@iGC+
package org.rut.util.algorithm; LM"y\q ]
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import org.rut.util.algorithm.support.BubbleSort; 50n}my'2h
import org.rut.util.algorithm.support.HeapSort; z-,VnhLx
import org.rut.util.algorithm.support.ImprovedMergeSort; qSD9Pue
import org.rut.util.algorithm.support.ImprovedQuickSort; \ZH&LPAY
import org.rut.util.algorithm.support.InsertSort; qZ X/@Yxz
import org.rut.util.algorithm.support.MergeSort; DC:)Ysuj
import org.rut.util.algorithm.support.QuickSort; E\th%q,mG
import org.rut.util.algorithm.support.SelectionSort; s 3r=mp{
import org.rut.util.algorithm.support.ShellSort; 4c159wsnQ
fn}UBzED\
/** DtF}QvA
* @author treeroot D7?C
* @since 2006-2-2 W?z#pV+jt
* @version 1.0 '\~^TFi
*/ qf8[!5GM
public class SortUtil { k \qiF|B)Z
public final static int INSERT = 1; e@n!x}t8
public final static int BUBBLE = 2; L?RF;jf
public final static int SELECTION = 3; nE|@IGH
public final static int SHELL = 4; Em^(
public final static int QUICK = 5; yL1CZ_
public final static int IMPROVED_QUICK = 6; 2]WE({P
public final static int MERGE = 7; mT.e>/pa
public final static int IMPROVED_MERGE = 8; aGoE,5
public final static int HEAP = 9; 7r 0,> 3"
;3m!:l
public static void sort(int[] data) { i8PuC^]
sort(data, IMPROVED_QUICK); N1x@-/xa|
} d,cN(
private static String[] name={ '&yeQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jbmTmh1q
}; Y(6Sp'0
..<3%fL3
private static Sort[] impl=new Sort[]{ Wa'sZ#
new InsertSort(), Q-eCHr)
new BubbleSort(), g,kzQ}_
new SelectionSort(), JPx7EEkZR4
new ShellSort(), ;#k-)m%
new QuickSort(), q/gB<p9
new ImprovedQuickSort(), (@sp/:`6
new MergeSort(), R,_d1^|*w
new ImprovedMergeSort(), >e&:`2%.
new HeapSort() -?a<qa?$
}; GWP dv
<4`eQ
public static String toString(int algorithm){ P?ep]
return name[algorithm-1]; Re=WfG
} C)RBkcb
e@]Wh)
public static void sort(int[] data, int algorithm) { pa<qZZ
impl[algorithm-1].sort(data); #kmh:P
} _GoVx=t
KL?)akk
public static interface Sort { Pz"`MB<'Ik
public void sort(int[] data); L;6.r3bL
} #AViM_u
olYsT**'
public static void swap(int[] data, int i, int j) { @aG&n(.!u*
int temp = data; -yx/7B5@
data = data[j]; nU z7|y
data[j] = temp; g:#dl\k
} !<\Br
} v"Jgw;3