[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; U\Y0v.11
} XY{N"S8
int i1=l; omg#[
int i2=mid+1; !U:&8Le
for(int cur=l;cur<=r;cur++){ E} ]=<8V
if(i1==mid+1) V'#R1x"3
data[cur]=temp[i2++]; EUs9BJFP
else if(i2>r) 7[P-;8)tq
data[cur]=temp[i1++]; J:"@S%gy%
else if(temp[i1] data[cur]=temp[i1++]; Mi#i 3y(
else cY5;~lO
data[cur]=temp[i2++]; 9QX!HQ|5y8
} aV7VbC
} S'^ q
dhA~Yu
} s<"|'~<n
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改进后的归并排序: K"VcPDK
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package org.rut.util.algorithm.support; '*L6@e#U
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import org.rut.util.algorithm.SortUtil; OQfFS+6
t O.5
/** ,x1OQ jtY
* @author treeroot ,ja!OZ0$
* @since 2006-2-2 0ZwXuq
* @version 1.0 ;8XRs?xyd
*/ , d $"`W2
public class ImprovedMergeSort implements SortUtil.Sort { *]HnFP
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private static final int THRESHOLD = 10; #S9J9k
wdP(MkaV
/* ^CLQs;zXE
* (non-Javadoc) &kzysv-_
* XxMZU(5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BVeMV4
*/ NW5OLa")J<
public void sort(int[] data) { L$3lsu!4n
int[] temp=new int[data.length]; d2Q*1Q@u
mergeSort(data,temp,0,data.length-1); FHU6o910
} 9h6Oq(0b8
cQhr{W,Un
private void mergeSort(int[] data, int[] temp, int l, int r) { k*)sz
int i, j, k; HdxP:s.T
int mid = (l + r) / 2; 8O]`3oa>
if (l == r) ?[Y(JO#
return; \AroSy9
if ((mid - l) >= THRESHOLD) ko[w#j
mergeSort(data, temp, l, mid); E>]K#H
else sq`Xz8u
insertSort(data, l, mid - l + 1); p" >*WQ
if ((r - mid) > THRESHOLD) V>T?'GbS
mergeSort(data, temp, mid + 1, r); o5a=>|?p>
else an"~n`g
insertSort(data, mid + 1, r - mid); .+u b\
%\<b{x# G
for (i = l; i <= mid; i++) { h97#(_wV>
temp = data; \wA:58 -j
} *p $0(bz
for (j = 1; j <= r - mid; j++) { A_9^S!
temp[r - j + 1] = data[j + mid]; t([}a~1}
} &;-zy%#l
int a = temp[l]; d)vP9vXy
int b = temp[r]; \PE;R.v_:
for (i = l, j = r, k = l; k <= r; k++) { ZEI,9`t!
if (a < b) { * HKu%g
data[k] = temp[i++]; ~)ys,Q
a = temp; HGGq;Nbm
} else { ;`#R9\C=h
data[k] = temp[j--]; 4`#Q
b = temp[j]; l@B9}Icq
} 3>1^$0iq
} v,ssv{gU
} xW`y7Q}p
]Orx%8QS!
/** d>hv-nD
* @param data (*$bTI/~
* @param l n6%`
* @param i uAPVR
*/ :82h GU
private void insertSort(int[] data, int start, int len) { 2DW@}[G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v3-' GgM
} E7A!,A&>
} m]2xOR_
} {=[>N>"
} e NIzI]~
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堆排序： tON>wmN
sFFQ]ST2p
package org.rut.util.algorithm.support; |EE1S{!24m
+%W8Juu
import org.rut.util.algorithm.SortUtil; 5X!-Hj
kMQ /9~
/** yc](
* @author treeroot C.jWT1
* @since 2006-2-2 f,HUr% @
* @version 1.0 sApix=Lr
*/ ,Z"<-%3
public class HeapSort implements SortUtil.Sort{ C27:tyV
{]^Ixm-,f
/* (non-Javadoc) ?mg@zq8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0\%g@j-aD
*/ &-ropY
public void sort(int[] data) { -@#w)
MaxHeap h=new MaxHeap(); `t U
h.init(data); SB\%"nnV
for(int i=0;i h.remove(); jn2=)KBa_
System.arraycopy(h.queue,1,data,0,data.length); jfuHZ^YA
} KG'i#(u[
Py)ZHML
private static class MaxHeap{ F[jE#M=k
"bo0O7InOV
void init(int[] data){ `$T$483/
this.queue=new int[data.length+1]; 7N9NeSH
for(int i=0;i queue[++size]=data; sAkr-x?+M
fixUp(size); J$3g3%t
} @ma(py
} \Rny*px
9"P|Csj
private int size=0; bx3Q$|M?
<gp?}Lk
private int[] queue; YQ+hQ:4-
Wgwd?@uK
public int get() { _VrY7Mz:r
return queue[1]; l[}4 X/
} &3Zq1o
+<7Oj s>o
public void remove() { 4_R|3L
SortUtil.swap(queue,1,size--); [qYr~:`-[
fixDown(1); i>F=XE
} ^|Q]WHNFB
file://fixdown hS]w A"\87
private void fixDown(int k) { 8%[pno |0I
int j; I~GF%$-G
while ((j = k << 1) <= size) { A]z*#+Sl
if (j < size %26amp;%26amp; queue[j] j++; :?t~|7O:
if (queue[k]>queue[j]) file://不用交换 ?%,NOX
break; v4ot08 C
SortUtil.swap(queue,j,k); fj_23{,/"g
k = j; fO*jCl
} N^Re
} P49\A^5S!
private void fixUp(int k) { (`tRJWbdz
while (k > 1) { c3vb~l)
int j = k >> 1; AJPvwu}D
if (queue[j]>queue[k]) .G0 N+)
break; 7;'33Bm*
SortUtil.swap(queue,j,k); ]{>AU^=U
k = j; Rr)+M3'
} [,zq
} =*mT{q@
.Mt3ec<
} 8t-GsjHb
=CX1jrLZ
} tdy2ZPVtTV
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SortUtil： LFp "Waiv
T{YZ`[
package org.rut.util.algorithm; .Eao|;
d$dy6{/YD
import org.rut.util.algorithm.support.BubbleSort; %`Re{%1;
import org.rut.util.algorithm.support.HeapSort; !IxO''4
import org.rut.util.algorithm.support.ImprovedMergeSort; )9QtnM
import org.rut.util.algorithm.support.ImprovedQuickSort; "t@p9>
import org.rut.util.algorithm.support.InsertSort; "}4%vZz
import org.rut.util.algorithm.support.MergeSort; ]MbPivM
import org.rut.util.algorithm.support.QuickSort; E~'mxx~i
import org.rut.util.algorithm.support.SelectionSort; qWt}8_"
import org.rut.util.algorithm.support.ShellSort; 2-&EkF4p'
_73q,3`24
/** f:T?oR>2
* @author treeroot 4M'>oa
* @since 2006-2-2 0YeTS!*Aj
* @version 1.0 i!wU8@
*/ JKfG/z|
public class SortUtil { P]E-Wp'p
public final static int INSERT = 1; jmok]-pC
public final static int BUBBLE = 2; Jd2.j?P=
public final static int SELECTION = 3; ~Bd=]a$mj
public final static int SHELL = 4; wT1s;2%
public final static int QUICK = 5; /?\3%<vn
public final static int IMPROVED_QUICK = 6; (~T*yH ~
public final static int MERGE = 7; e|~MJu+1
public final static int IMPROVED_MERGE = 8; 0c_xPBbB+
public final static int HEAP = 9; pl[J!d.c
B@,9Cx564
public static void sort(int[] data) { p6VD*PT$&
sort(data, IMPROVED_QUICK); Dn- gP
} 6Rd4waj_,U
private static String[] name={ ~6vz2DuB=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >yIJ8IDF
}; xo:kT)
hy;VvAH5
private static Sort[] impl=new Sort[]{ !<bwg
new InsertSort(), !_S>ER
new BubbleSort(), V5|ANt
new SelectionSort(), [U\?+@E*
new ShellSort(), |s|}u`(@9
new QuickSort(), XQ}Zr/f6
new ImprovedQuickSort(), Fsx?(?tCMo
new MergeSort(), 4 1_gak;
new ImprovedMergeSort(), *O?c~UJhhV
new HeapSort() _n&Nw7d2 M
}; ngY%T5-
n,la<N]
public static String toString(int algorithm){ {Gxe%gu6K
return name[algorithm-1]; 7 ,Rg~L
} :Pud%}'
xad`-vw
public static void sort(int[] data, int algorithm) { WJ7|0qb
impl[algorithm-1].sort(data); 74s{b]jN'-
} [oWkd_dK
Bqx5N"
public static interface Sort { 8h)XULs2
public void sort(int[] data); 2*Z2uV^
} 8*ZsR)!
rIb+c=|F
public static void swap(int[] data, int i, int j) { ,d G.67
int temp = data; ``o]i{x
data = data[j]; Z`Yt~{,Q
data[j] = temp; b@:OlZ~%
} c]=2>ov)hR
} ">A<%5F2