[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; QUF1_Sa
} Ri}JM3\J
int i1=l; 23opaX5V=
int i2=mid+1; QkLcs6)R
for(int cur=l;cur<=r;cur++){ Ct:c%D(L
if(i1==mid+1) A2Iqn5
data[cur]=temp[i2++]; ?ZkVk=t?
else if(i2>r) V;P*/ke
data[cur]=temp[i1++]; }VVtv1
else if(temp[i1] data[cur]=temp[i1++]; %WYveY
else D2io3Lo$ov
data[cur]=temp[i2++]; L:jv%;DM
} 'lgS)m
} /)rv Ndn
SL_JA
} WckWX]};S
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改进后的归并排序: [kPl7[OL
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package org.rut.util.algorithm.support; 0_t9;;y :
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import org.rut.util.algorithm.SortUtil; lvUWs
ntZHO}'
/** ,{Z!T5 |
* @author treeroot !T}R=;)eh
* @since 2006-2-2 t /lU*
* @version 1.0 PW9tZx#
*/ :r&4/sN}<
public class ImprovedMergeSort implements SortUtil.Sort { #O7phjzgD
kQrby\F(<
private static final int THRESHOLD = 10; 1#2L9Bi
x![ut
/* [Fr <tKtB
* (non-Javadoc) X C'|
* /)r[}C0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2JHV*/Q
*/ m\K1Ex
public void sort(int[] data) { A.<M*[{q
int[] temp=new int[data.length]; MhN8'y(
mergeSort(data,temp,0,data.length-1); AQ,%5MeqJ
} VJtRL')
<ol?9tm
private void mergeSort(int[] data, int[] temp, int l, int r) { @$?*UI6y
int i, j, k; U@)WTH6d
int mid = (l + r) / 2; f5.Be%
if (l == r) "GAKi}y">v
return; <@qJsRbhK
if ((mid - l) >= THRESHOLD) ;.~D!
mergeSort(data, temp, l, mid); !:1BuiL
else vz)zl2F5sY
insertSort(data, l, mid - l + 1); S2$r 6T
if ((r - mid) > THRESHOLD) 6H|&HV(!R
mergeSort(data, temp, mid + 1, r); CrX1qyR
else 4aG}ex-s|
insertSort(data, mid + 1, r - mid); t},71Ry
/ASpAl[J
for (i = l; i <= mid; i++) { ;-kg3fGB1Q
temp = data; e{*z4q1
} -M`+hVs?
for (j = 1; j <= r - mid; j++) { E1|:t$>Ld
temp[r - j + 1] = data[j + mid]; r6}-EYq=
} IHe?/oUL"b
int a = temp[l]; ;x4yidb6
int b = temp[r]; v$R7"
for (i = l, j = r, k = l; k <= r; k++) { =M34 HPG
if (a < b) { t` zPx#])
data[k] = temp[i++]; HO39>:c
a = temp; iKgH :[j
} else { HQrx9CXE
data[k] = temp[j--]; 2;YL+v2
b = temp[j]; Bet?]4\_
} !Bb^M3iA
} @86I|cY
} CNyV6jb
]Hrw$\Ky
/** f_tC:T4a
* @param data stlkt>9
* @param l 6>/g`%`N
* @param i 6ieP` bct
*/ oF(|NS^
private void insertSort(int[] data, int start, int len) { Uj>bWa`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jftf]n&Z(q
} s;YuB#Z
} bF? {
} ]08 ~"p
} mO^vKq4r.
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堆排序： g2GHsVS
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package org.rut.util.algorithm.support; $rmfE
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import org.rut.util.algorithm.SortUtil; %n>*jFC
0]`%iG|
/** %PxJnMb?
* @author treeroot !;;WS~no3
* @since 2006-2-2 /FA0(< -}
* @version 1.0 ($Ck5`_MK
*/ +umVl
public class HeapSort implements SortUtil.Sort{ I]Jz[{~1
eh}{\P
/* (non-Javadoc) SpiI9)gp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5$L=l
*/ h;2n2.Q
public void sort(int[] data) { p1(<F_Kta
MaxHeap h=new MaxHeap(); B]|"ePj-
h.init(data); XKepk? E
for(int i=0;i h.remove(); IJV1=/NJW
System.arraycopy(h.queue,1,data,0,data.length); 5t~p99#?
} Uk|(VR9
8\@&~&(y:
private static class MaxHeap{ 7!"OF
[agp06 $D?
void init(int[] data){ HCTjFW>C
this.queue=new int[data.length+1]; ^+zhzfJ
for(int i=0;i queue[++size]=data; XhEd9>#
fixUp(size); [<p7'n3x
} ;OynkZs)
} ffqz :6
p?,:
private int size=0; pv #uLo
}D>nXhO&
private int[] queue; TwZASn]o
L#^'9v}Hb
public int get() { WYklS<B[
return queue[1]; T,eP&IN
} A$]&j5nh|
0kdPr:B Q0
public void remove() { u!VAAX
SortUtil.swap(queue,1,size--); -$js5Gx1
fixDown(1); U,wJ8
} !$i*u-%4
file://fixdown 3j iSvrfI
private void fixDown(int k) { zrg#BXj7
int j; DZI:zsf;5Q
while ((j = k << 1) <= size) { 5 UQbd8
if (j < size %26amp;%26amp; queue[j] j++; ]%y3*N@AZ
if (queue[k]>queue[j]) file://不用交换 5}uH;E)4
break; N5%zbfKM
SortUtil.swap(queue,j,k); Qwm#6{5
k = j; hS}d vZa
} ~K-c-Zs#z
} ^6E+l#
private void fixUp(int k) { ?Q]{P]
while (k > 1) { D/ SM/
int j = k >> 1; 8 N5ga
if (queue[j]>queue[k]) 5D32d1A
break; IP 9{vk
SortUtil.swap(queue,j,k); d }"Dp
k = j; U?}>A5H
} 2$MIA?A"Y
} <{"]&bl
,(6U3W*bu
} AI|8E8h+D
KfO$bmwmx
} 4\.1phe$a
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SortUtil： 5jTBPct
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package org.rut.util.algorithm; >>ncq$
'n9<z)/,!
import org.rut.util.algorithm.support.BubbleSort; {p{TG5rwX
import org.rut.util.algorithm.support.HeapSort; QeK@++EVc
import org.rut.util.algorithm.support.ImprovedMergeSort; yj6o533o
import org.rut.util.algorithm.support.ImprovedQuickSort; ZZ<uiN$
import org.rut.util.algorithm.support.InsertSort; LG0z|x(
import org.rut.util.algorithm.support.MergeSort; -\b$5oa(
import org.rut.util.algorithm.support.QuickSort; ]pZxbs&Vb
import org.rut.util.algorithm.support.SelectionSort; N6"b OxJ(
import org.rut.util.algorithm.support.ShellSort; |6%B2I&c
Q]Ymv:M,
/** &B</^:
* @author treeroot ;^q@w
* @since 2006-2-2 1<y|,
* @version 1.0 s)=fs#%
*/ [Ch)6p
public class SortUtil { p97}HT}
public final static int INSERT = 1; wF +9Iu
public final static int BUBBLE = 2; w"Q6'/P
public final static int SELECTION = 3; \ 2$nFr?0
public final static int SHELL = 4; nhfHY-l}7
public final static int QUICK = 5; 03WLVP@
public final static int IMPROVED_QUICK = 6; 6*] g)m
public final static int MERGE = 7; 7X h'VOljB
public final static int IMPROVED_MERGE = 8; Xndgs}zz
public final static int HEAP = 9; b h%@Lo
Sn I-dXNF
public static void sort(int[] data) { )T-C/ 3
sort(data, IMPROVED_QUICK); 5J d7<AO_
} *}pl
private static String[] name={ Zc_%hQf2A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7oj ^(R,
}; t% -"h|
)20jZm*
private static Sort[] impl=new Sort[]{ uSeRn@
new InsertSort(), Htg,^d 5
new BubbleSort(), pvCf4pf~
new SelectionSort(), 0y>]68D
new ShellSort(), mVJW"*}8
new QuickSort(), &+@~;p5F
new ImprovedQuickSort(), 4fK(<2i
new MergeSort(), y\=(;]S'
new ImprovedMergeSort(), Mw=sW5Z
new HeapSort() :xn/9y+s
}; *Y4h26
ikr|P&e#u
public static String toString(int algorithm){ G+k[.
return name[algorithm-1]; 4 1w*<{Lk
} Gi7jgv{{
KC+C?]~M
public static void sort(int[] data, int algorithm) { !1i(6?~#4
impl[algorithm-1].sort(data); :)!X%2_
} `t0?PpUo
I)wjTTM5
public static interface Sort { 'dE G\?v9
public void sort(int[] data); l[KFK%?
} Y^zL}@
2_^{Vez@I
public static void swap(int[] data, int i, int j) { "qL4D4
int temp = data; Hwr# NKz-
data = data[j]; I\NiA>c
data[j] = temp; ye-o'%{
} jy=dB-&
} ' 0iXx