[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; Z1+Ewq3m
} Lp@Al#X55
int i1=l; iyr8*L\
int i2=mid+1; 99By.+~pX
for(int cur=l;cur<=r;cur++){ )\2KDXc
if(i1==mid+1) /38I(0
data[cur]=temp[i2++]; 77aUuP7Iw
else if(i2>r) FV aC8Kw
data[cur]=temp[i1++]; z[R dM#L
else if(temp[i1] data[cur]=temp[i1++]; 'NfsAE
else 'W54 T
data[cur]=temp[i2++]; F`(;@LO
} vkR~nIp
} !Y7$cU &
"iX\U'`
} 0:4>rYBC
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改进后的归并排序: ][V`ym-e
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package org.rut.util.algorithm.support; g+QIhur
zw$\d1-+h
import org.rut.util.algorithm.SortUtil; I5g|)Y Q
3="vOSJ6&
/** ;!t?*
* @author treeroot /n>vPJvz
* @since 2006-2-2 G973n
* @version 1.0 n<> ^cD
*/ (f_J @n
public class ImprovedMergeSort implements SortUtil.Sort { SK@ p0:
}2m>S6""A
private static final int THRESHOLD = 10; 9xw"NcL
dBovcc
/* H_x}-
* (non-Javadoc) c~OPH 0,
* 7 <]YK`a2d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n6Uf>5
*/ h&d"|<
public void sort(int[] data) { 7 H:y=?X6
int[] temp=new int[data.length]; s?->2gxhx
mergeSort(data,temp,0,data.length-1); i1KjQ1\a+
} S# baOO
4tUt"N
private void mergeSort(int[] data, int[] temp, int l, int r) { n4 N6]W\5
int i, j, k; w,R6:*p5
int mid = (l + r) / 2; ?@FqlWz,
if (l == r) &OXx\}>MW
return; V\r{6-%XiW
if ((mid - l) >= THRESHOLD) 4t/?b
mergeSort(data, temp, l, mid); r%X M`;bQX
else h?B1Emlq
insertSort(data, l, mid - l + 1); #=ij</
if ((r - mid) > THRESHOLD) 8No'8(dPX
mergeSort(data, temp, mid + 1, r); `Eu,SvkFw
else kv+^U^WoU
insertSort(data, mid + 1, r - mid); Lw(tO0b2H
JgKhrDx
for (i = l; i <= mid; i++) { 2DJg__("
temp = data; L;{{P7
} d=uGB"
for (j = 1; j <= r - mid; j++) { C|w<mryx
temp[r - j + 1] = data[j + mid]; @o'L!5Y
} E?KPez
int a = temp[l]; VSV]6$~H
int b = temp[r]; 9(z) ^G
for (i = l, j = r, k = l; k <= r; k++) { [E6ceX0
if (a < b) { e00}YWf%
data[k] = temp[i++]; hDZyFRg
a = temp; v.>K )%`#
} else { l;R8"L:,p\
data[k] = temp[j--]; U,6sR
b = temp[j]; ,`YBTU
} \QF0(*!!
} D Y4!RjJ47
} Gx}`_[-
r#&JfAo
/** l`:u5\ rM
* @param data 1ZYo-a;)
* @param l T:2f*!r
* @param i 3k(tv U+eC
*/ R)*l)bpZ#
private void insertSort(int[] data, int start, int len) { cTRtMk%^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QUvSeNSp
} %N(>B_t\
} #9.%>1{6Y
} t?Qbi)T=z
} uWFyI"
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堆排序： _FcTY5."S
UHU ,zgM
package org.rut.util.algorithm.support; aot2F60J,
@V5i
import org.rut.util.algorithm.SortUtil; @H~oOf
`"yxmo*0
/** 9^?muP<A
* @author treeroot soQ[Zg4}
* @since 2006-2-2 T{`VUS/
* @version 1.0 .sM,U
*/ ^ACrWk~UY
public class HeapSort implements SortUtil.Sort{ $_TS]~y4}
0rI/$
/* (non-Javadoc) =&9c5"V&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U/cj_}uX
*/ ST?Rl@4
public void sort(int[] data) { &nI>`Q'
MaxHeap h=new MaxHeap(); tu* uQ:Ipk
h.init(data); oJ3(7Sz
for(int i=0;i h.remove(); 2QAP$f0Ln
System.arraycopy(h.queue,1,data,0,data.length); ZnzO]
} ']I!1>v$[
w{k^O7~
private static class MaxHeap{ d6JW"
i4h`jFS
void init(int[] data){ *l"CIG'
this.queue=new int[data.length+1]; hAc|a9 o
for(int i=0;i queue[++size]=data; OgC,oj,!/
fixUp(size); 5p:BHw;%;
} 5G(dvM-n
} #ley3rJW]
!!V1#?0jw
private int size=0; 8Q)|8xpYS
w$-q&
private int[] queue; bolG3Tf|
9\WtcLx
public int get() { t1J3'lS
return queue[1]; i\b^}m8c.N
} i$6rnS&C
G8%VL^;O*5
public void remove() { qhcx\eD:?
SortUtil.swap(queue,1,size--); |&W4Dkn
fixDown(1); _#&oQFdYR
} c(2?./\|
file://fixdown 'bSWJ/;p)
private void fixDown(int k) { GQhy4ji'z
int j; ^dhx/e%s
while ((j = k << 1) <= size) { hi/d%lNZ
if (j < size %26amp;%26amp; queue[j] j++; d4^x,hzV
if (queue[k]>queue[j]) file://不用交换 /^k%sG@?
break; ?a% F3B
SortUtil.swap(queue,j,k); cHT\sJo`l
k = j; y {Bajil
} +PADy8
} %Y=r5'6l
private void fixUp(int k) { |?Edk7`
while (k > 1) { 8OV=;aM?{
int j = k >> 1; G6W|l2P!
if (queue[j]>queue[k]) PLz+%L;{
break; K\fD';
SortUtil.swap(queue,j,k); Y%0rji
k = j; ")vtS}Ekt
} Kb{&a
} U5~aG!E
0#8, (6
} ;]m;p,$
32SkxcfrCK
} )AR-b8..o
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SortUtil： )[ZXPD
T$R#d&t
package org.rut.util.algorithm; VV}"zc^
f+s)A(?3
import org.rut.util.algorithm.support.BubbleSort; #V]8FW
import org.rut.util.algorithm.support.HeapSort; fjy\Q
import org.rut.util.algorithm.support.ImprovedMergeSort; ]u$tKC
import org.rut.util.algorithm.support.ImprovedQuickSort; W'"?5} (
import org.rut.util.algorithm.support.InsertSort; )uo".n|n~B
import org.rut.util.algorithm.support.MergeSort; 3%GsTq2o
import org.rut.util.algorithm.support.QuickSort; fiA8W
import org.rut.util.algorithm.support.SelectionSort; XxdD)I
import org.rut.util.algorithm.support.ShellSort; 6Y,&q|K
MaY_*[
/** 0uW)&>W
* @author treeroot B;NK\5>
* @since 2006-2-2 }s@IQay+
* @version 1.0 *C+[I
*/ ?Sa,n^b*H
public class SortUtil { q. Jx|x
public final static int INSERT = 1; iV?8'^
public final static int BUBBLE = 2; Kg>B$fBx)
public final static int SELECTION = 3; YlG#sBzl
public final static int SHELL = 4; L xIKH G
public final static int QUICK = 5; F02TM#Zi
public final static int IMPROVED_QUICK = 6; O|=?!|`o
public final static int MERGE = 7; @d|Sv1d%
public final static int IMPROVED_MERGE = 8; uE(5q!/
public final static int HEAP = 9; +@f
Q$]1juqg
public static void sort(int[] data) { GBRiU&D
sort(data, IMPROVED_QUICK); /|UbYe,
} oPaoQbR(A
private static String[] name={ vf<Dqy<M.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rKslgZhQ
}; @jMo/kO/A
-X7x~x-
private static Sort[] impl=new Sort[]{ uaKbqX
new InsertSort(), CVkJMH_
new BubbleSort(), Z`GEF|eh
new SelectionSort(), bf2n%-&9g
new ShellSort(), ~p n$'1Q
new QuickSort(), MoEh25U.
new ImprovedQuickSort(), M.MQ?`_"b
new MergeSort(), "a'I^B/
new ImprovedMergeSort(), N: 38N
new HeapSort() o~9*J)X5i
}; i>CR{q
>!" Sr3,L
public static String toString(int algorithm){ Nv;'Ys P
return name[algorithm-1]; W1xPK*
} J>#yA0QD2
<zvtQ^{]
public static void sort(int[] data, int algorithm) { _4SZ9yu
impl[algorithm-1].sort(data); # .(f7~
} z@\mn
2h*aWBLk
public static interface Sort { %P<fz1
public void sort(int[] data); h,BPf5\S
} $t"QLsk0
+N+117m
public static void swap(int[] data, int i, int j) { mr#.uhd.z
int temp = data; Fec4#}|
data = data[j]; ^z,B}Nz
data[j] = temp; S["r @<
} 9 4lt?|3=
} W wj+\