[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; y[C++Q
} A"V($:>U
int i1=l; I:L}7uA[t
int i2=mid+1; ma gZmY~
for(int cur=l;cur<=r;cur++){ [f1'Qb
if(i1==mid+1) _s1pif
data[cur]=temp[i2++]; Jp d|<\Ml
else if(i2>r) F3%8E<QZd;
data[cur]=temp[i1++]; _K4E6c_
else if(temp[i1] data[cur]=temp[i1++]; 5}+&Em":
else yMd<<:Ap
data[cur]=temp[i2++]; o#^(mGj_.
} Bh#?:h&f
} KkIgyLM
6XFLWN-)
} Bp7`W:?#"
6w"_sK?
改进后的归并排序: Ue=Je~Ri;9
R [[ #r5q
package org.rut.util.algorithm.support; ]RvFn~E!s
$$5E+UDOs
import org.rut.util.algorithm.SortUtil; Ik\n/EE
Z]QpH<Z
/** '&;s32']}
* @author treeroot ^?~WIS
* @since 2006-2-2 xnR;#Yc
* @version 1.0 y37c&XYq
*/ NKSK+ll2
public class ImprovedMergeSort implements SortUtil.Sort { ;UAi>//#
gfW_S&&q
private static final int THRESHOLD = 10; UGb<&)
cm'`u&S
/* 1Mtm?3Pt
* (non-Javadoc) AW R
* ROWI.|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UA8*8%v
*/ FYLBaN
public void sort(int[] data) { sU=7)*$
int[] temp=new int[data.length]; ZHN@&Gg6)
mergeSort(data,temp,0,data.length-1); %3:[0o={d
} \se /2l
'bb*$T0=
private void mergeSort(int[] data, int[] temp, int l, int r) { XaxM$
int i, j, k; T[L7-5U0
int mid = (l + r) / 2; I&Z4?K
if (l == r) )&") J}@
return; -Gyj]v5y`c
if ((mid - l) >= THRESHOLD) Cd7imj
mergeSort(data, temp, l, mid); n|M~C\*
else {tDH !sX
insertSort(data, l, mid - l + 1); \Qgc7ev
if ((r - mid) > THRESHOLD) ;k=&ZV
mergeSort(data, temp, mid + 1, r); c{,VU.5/
else Jqp;8DV}
insertSort(data, mid + 1, r - mid); v]?zG&Jh
"G[yV>pxv
for (i = l; i <= mid; i++) { [Nw%fuB
temp = data; wyi%!H
} 9sI&&Jg
for (j = 1; j <= r - mid; j++) { i[#XYX'\
temp[r - j + 1] = data[j + mid]; |b+ZKRW
} !!\x]$v
int a = temp[l]; 8{f~tPY
int b = temp[r]; _-R&A@
for (i = l, j = r, k = l; k <= r; k++) { y[64O x
if (a < b) { b;5&V_
data[k] = temp[i++]; h6(\ tRd!\
a = temp; (rE.ft5$9
} else { n90DS/Yx
data[k] = temp[j--]; xe&w.aBI>
b = temp[j]; t9\}!{<s
} N fBH
} 2N}UB=J
} !j8 DCVb
LZI[5tA"
/** JP1XH k
* @param data iU/v;T(
* @param l f =MP1q[
* @param i O,[9E
*/ ]=Dzr<*v
private void insertSort(int[] data, int start, int len) { ?glK~G!i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hR+\,P#G[
} wV\.NQtS
} U^&,xz$Cg
} k5@PZFV
} h0oe'Xov
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堆排序： Errs6
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package org.rut.util.algorithm.support; /=K(5Xd
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import org.rut.util.algorithm.SortUtil; q\n,/#'i~
kc7,F2=F
/** t8ZzBD!dP
* @author treeroot f6])M)
* @since 2006-2-2 8svN*`[
* @version 1.0 oB$c-!&
*/ L:_GpZ_
public class HeapSort implements SortUtil.Sort{ )jPIBzMys
: =f!>_r+
/* (non-Javadoc) i1 >oRT{Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rT"3^,,
*/ kQw%Wpuq[/
public void sort(int[] data) { V~ q b2$
MaxHeap h=new MaxHeap(); [aF"5G
h.init(data); %5ovW<E:
for(int i=0;i h.remove(); WS6;ad;|
System.arraycopy(h.queue,1,data,0,data.length); + usB$=kJ
} 7SJbrOL4Q-
;u*I#)7
private static class MaxHeap{ 1'YUK"i
=1+/`w
void init(int[] data){ X-y3CO:&@h
this.queue=new int[data.length+1]; c\le8C3
for(int i=0;i queue[++size]=data; i?:#lbw_
fixUp(size); -~Chf4?<4
} t\XA JU
} dJF3]h Y
1}Th@Vq
private int size=0; QJF_ "
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private int[] queue; ,v#O{ma
}B ?_>0
public int get() { 4Ifz-t/
return queue[1]; `rest_vu
} u\q(v D.
Vj[hT~{f
public void remove() { 'mTQ=1
SortUtil.swap(queue,1,size--); _-|+k
fixDown(1); &d_2WQ}
} sH.,O9'r
file://fixdown ]NyN@9u@(
private void fixDown(int k) { Ke^9R-jP
int j; #+Y%Bxf
while ((j = k << 1) <= size) { Jbn^G7vH<6
if (j < size %26amp;%26amp; queue[j] j++; &Lbh?C
if (queue[k]>queue[j]) file://不用交换 *|as-!${k
break; <8ih >s(C
SortUtil.swap(queue,j,k); `Jj q5:\&
k = j; RqKkB8g
} i<{:J -U|
} fb[? sc
private void fixUp(int k) { Q%:Z&lgy
while (k > 1) { %uz6iQaq]X
int j = k >> 1; 9I[k3
if (queue[j]>queue[k]) (tCBbPW6T?
break; zSagsH |W
SortUtil.swap(queue,j,k); 3/ '5#$
k = j; AAF']z<4_"
} B:VGa<lx5
} =wMq!mBd
&S39SV
} I23"DBR3
~(`&hYE
} NQcNY=
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SortUtil： aUi^7;R&<
k'NP+N<M
package org.rut.util.algorithm; `$MO;Fv,G
uT>"(wnJ|
import org.rut.util.algorithm.support.BubbleSort; ?_d3|]N
import org.rut.util.algorithm.support.HeapSort; hd W7Qck"
import org.rut.util.algorithm.support.ImprovedMergeSort; 6a704l%#hb
import org.rut.util.algorithm.support.ImprovedQuickSort; E BSjU8
import org.rut.util.algorithm.support.InsertSort; tB`IBuy9!"
import org.rut.util.algorithm.support.MergeSort; i_:#][nWX
import org.rut.util.algorithm.support.QuickSort; {^?:-#~h
import org.rut.util.algorithm.support.SelectionSort; 2^qJ'<2]M
import org.rut.util.algorithm.support.ShellSort; 0j2mTF(C
[QIQpBL
/** m^ /s}WEqp
* @author treeroot NNMn,J
* @since 2006-2-2 #~4;yY\$I
* @version 1.0 Myf2"\}
*/ a4mRu|x
public class SortUtil { q ,+29
public final static int INSERT = 1; ; o(:}d
public final static int BUBBLE = 2; IdCE<Oj\
public final static int SELECTION = 3; R[l~E![!j
public final static int SHELL = 4; `neo.]
public final static int QUICK = 5; 4|UtE<<b
public final static int IMPROVED_QUICK = 6; &\ K
public final static int MERGE = 7; }L @~!=q*
public final static int IMPROVED_MERGE = 8; Oq:$GME
public final static int HEAP = 9; -b)3+#f
+R_s(2vz
public static void sort(int[] data) { _zkTx7H
sort(data, IMPROVED_QUICK); *xN?5u%
} +F~B"a
private static String[] name={ m95] z18T'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NU"L1dK @
}; 4n*`%V
U|b)Bw<P
private static Sort[] impl=new Sort[]{ ZAgtVbO7
new InsertSort(), >`<qa!9
new BubbleSort(), o7^0Lo5Z?
new SelectionSort(), </b_Rar
new ShellSort(), %pLqX61t=
new QuickSort(), z'*{V\
new ImprovedQuickSort(), (+}44Ldt
new MergeSort(), PbfgWGr
new ImprovedMergeSort(), U?ZWDr"*`w
new HeapSort() E)|Bl>
}; fOdX2{7m
owwWm1@
public static String toString(int algorithm){ 5lyHg{iqD
return name[algorithm-1]; %~M#3Ywa
} ]G^9PZ-
\(}pm#O
public static void sort(int[] data, int algorithm) { Wiyiq )^
impl[algorithm-1].sort(data); `/9I` <y
} Cq[Hh#q
pb G5y7
public static interface Sort { j=c< Lo`
public void sort(int[] data); $W9dUR0
} Ya-GDB;L
LYiIJAZ.
public static void swap(int[] data, int i, int j) { D~M*]&
int temp = data; ^>^h|$
data = data[j]; "N)InPR-
data[j] = temp; -j@IDd7
} ^])s\a$
} ?X Rl\V