[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; .E:3I!dH7
} gW5yLb_Vz$
int i1=l; u|mTF>L
int i2=mid+1; zA>LrtyK(=
for(int cur=l;cur<=r;cur++){ 2zV{I*
if(i1==mid+1) :>|dE%/e$
data[cur]=temp[i2++]; y+aKk6(_W
else if(i2>r) [n2+`A
data[cur]=temp[i1++]; nO+-o;DbC
else if(temp[i1] data[cur]=temp[i1++]; |AQU\BUj
else `pYyr/
data[cur]=temp[i2++]; 2il`'X
} o"V+W
} $a01">q&y
/szwVA
} A_\`Gj!s%
68UfuC
改进后的归并排序: 2Ij,OIcdBE
Op'&c0l
package org.rut.util.algorithm.support; :cxA
'ti~TG
import org.rut.util.algorithm.SortUtil; }`$s"Iv@
_f1;Hhoa
/** '5m4kDs
* @author treeroot FNw0x6,~R
* @since 2006-2-2 hh-a+] c0
* @version 1.0 |@1M'
*/ 5SMV3~*P
public class ImprovedMergeSort implements SortUtil.Sort { YNB7`:
j"s7P%
private static final int THRESHOLD = 10; -N'wKT5
A>ve|us$
/* w:pPd;nz0Y
* (non-Javadoc) 6U0BP
* FVxORQI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dBkM~"
*/ iYf)FPET
public void sort(int[] data) { p9E/#U8A_
int[] temp=new int[data.length]; wVq9t|V
mergeSort(data,temp,0,data.length-1); 8:;]tt
} DDq?4
bt};Pn{3
private void mergeSort(int[] data, int[] temp, int l, int r) { SsEpuEn
int i, j, k; ICEyz| C
int mid = (l + r) / 2; D$AvD7_
if (l == r) RW<10:
return; 4?fpk9c{2
if ((mid - l) >= THRESHOLD) %g~&$oZmq
mergeSort(data, temp, l, mid); sU+8'&vBp
else z1^3~U$}
insertSort(data, l, mid - l + 1); ([dwZ6$/J
if ((r - mid) > THRESHOLD) >V>`}TIH
mergeSort(data, temp, mid + 1, r); =axuLP))
else t#VX#dJ
insertSort(data, mid + 1, r - mid); 5WA:gygB&
/9A6"Z
for (i = l; i <= mid; i++) { 5\EnD,y
temp = data; R,s}<N$
} r1Hh @sxn
for (j = 1; j <= r - mid; j++) { lWn}afI
temp[r - j + 1] = data[j + mid]; +c8t~2tuN
} P}^Y"zF2
int a = temp[l]; XtQwLH+F
int b = temp[r]; "D'rsEh
for (i = l, j = r, k = l; k <= r; k++) { ~.4y* &
if (a < b) { EOZ 6F-':
data[k] = temp[i++]; ~Zn|(
a = temp; AmZW=n2^
} else { {;|pcx\L6~
data[k] = temp[j--]; 3B='f"G
b = temp[j]; ))dw[Xa
} Fi'ZId
} ilXKJJda
} D~bx'Wr+
,c-*/{3
/** psse^rFg
* @param data P+Gz'
* @param l 764eXh
* @param i /1p5KVTKv
*/ 6<9}>Wkf
private void insertSort(int[] data, int start, int len) { <5"&]! .
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @u`W(Ow
} OFBEJacy
} }.pqV X{d
} PhPe7^
} cs7^#/3<
2$MoKOx8$
堆排序： Fe %Vp/
vcCNxIzEG
package org.rut.util.algorithm.support; B9Mp3[
Y<jX[ET!
import org.rut.util.algorithm.SortUtil; =''WA:,=h
omGzyuPF
/** Qv`: E
* @author treeroot S?6-I,]h
* @since 2006-2-2 s)fahc(@E
* @version 1.0 Hj(K*z
*/ c|(J%@B)
public class HeapSort implements SortUtil.Sort{ Caz5q|Oo
d#XgO5eyO
/* (non-Javadoc) <.Pt%Kg^BS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $P#x>#+[A
*/ IN@o9pUjV
public void sort(int[] data) { h-|IZ}F7
MaxHeap h=new MaxHeap(); v%c/eAF
h.init(data); .vctuy&
for(int i=0;i h.remove(); G'u[0>
System.arraycopy(h.queue,1,data,0,data.length); mr/?w0(C
} k6J&4?xZ
"dGN0i
private static class MaxHeap{ cWG%>.`5r
mQ<4(qd)
void init(int[] data){ )HC/J-
this.queue=new int[data.length+1]; ll1N`ke
for(int i=0;i queue[++size]=data; b !y
fixUp(size); z5oJQPPi
} \NMqlxp2
} C7G,M
G3`9'-2q@c
private int size=0; .%)uCLZr$
iqdU?&.;
private int[] queue; hJ]Oa7r
|/H?\]7
public int get() { =4'V}p
return queue[1]; 3!\h'5{
} f^*Yqa
,}]v7DD
public void remove() { M]p-<R\
SortUtil.swap(queue,1,size--); k7Qs#L
fixDown(1); ZgG~xl\My
} 9) ,|h
file://fixdown {aq)Y>o5:T
private void fixDown(int k) { ~c<8;,cjYR
int j; S5u$I
while ((j = k << 1) <= size) { cfilH"EK
if (j < size %26amp;%26amp; queue[j] j++; :hs~;vn)
if (queue[k]>queue[j]) file://不用交换 U]gUGD!5x
break; 7M4J{}9
SortUtil.swap(queue,j,k); 9PA<g3z
k = j; akNqSZwj
} r180vbN$
} hSw=Oq82
private void fixUp(int k) { Pzq^x]
while (k > 1) { 9Q}g Vqn
int j = k >> 1; I<CrEL<5}~
if (queue[j]>queue[k]) qPD(D{,f$
break; qbD 7\%
SortUtil.swap(queue,j,k); EpNN!s=Q
k = j; \/<VJB uV
} 7I'C'.6iM
} ~ z3J4s
w&p(/y
} 7 s{vou
UO&$1rV
} CEI"p2
* 30K}&T
SortUtil： (E)hEQ@8
`7w-_o %
package org.rut.util.algorithm; aVHIU3
^~-YS-.J#,
import org.rut.util.algorithm.support.BubbleSort; _~;%zFX
import org.rut.util.algorithm.support.HeapSort; vm[*+&\2
import org.rut.util.algorithm.support.ImprovedMergeSort; 7@>/O)>(AS
import org.rut.util.algorithm.support.ImprovedQuickSort; ]b;m~|9
import org.rut.util.algorithm.support.InsertSort; xx>hJ!
import org.rut.util.algorithm.support.MergeSort; C 'MR=/sd
import org.rut.util.algorithm.support.QuickSort; !hZ: \&V
import org.rut.util.algorithm.support.SelectionSort; \Z3K ~
import org.rut.util.algorithm.support.ShellSort; d8vf kVB
eK l;T
/** 3m!tb)
* @author treeroot 5v)bs\x6
* @since 2006-2-2 o ?vGI=
* @version 1.0 Q17dcgd
*/ dt:$:,"
public class SortUtil { a{r"$>0
public final static int INSERT = 1; L?ht^ H
public final static int BUBBLE = 2; ~`QoBZ.O&
public final static int SELECTION = 3; <fG\J
public final static int SHELL = 4; O7 aLW
public final static int QUICK = 5; V=*^C+6s
public final static int IMPROVED_QUICK = 6; P'OvwA
public final static int MERGE = 7; (1[59<cg]
public final static int IMPROVED_MERGE = 8; 96<oX:#
public final static int HEAP = 9; t!3N|`x
!2.BLJE>
public static void sort(int[] data) { U< G2tn(
sort(data, IMPROVED_QUICK); D)ri_w!Q
} U< Xdhgo?
private static String[] name={ [Cv./hEQi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uOLShNo
}; <C&|8@A0
O7VEyQqf5
private static Sort[] impl=new Sort[]{ F""9O6u
new InsertSort(), |EX=Rj*
new BubbleSort(), }q@#M8b
new SelectionSort(), i,*m(C@F}
new ShellSort(), 9;U?_
new QuickSort(), t kj
new ImprovedQuickSort(), H( i
new MergeSort(), dREY m}1
new ImprovedMergeSort(), 3r kcIVO
new HeapSort() sd\p[MXX
}; A_oZSUrR
$xZ ~bE9
public static String toString(int algorithm){ Cn3_D
return name[algorithm-1]; SW#/;|m
} f; |fS~
gx9Os2Z|3
public static void sort(int[] data, int algorithm) { :}v-+eIQ
impl[algorithm-1].sort(data); ;C$+8%P4
} i>YQ<A1
K#wA ;
public static interface Sort { }psRgF
public void sort(int[] data); e9KD mX_
} YP_L~zZ
G$i)ELs
public static void swap(int[] data, int i, int j) { 950N\Y@u
int temp = data; %|(c?`2|
data = data[j]; p 4>ThpX
data[j] = temp; 70c]|5
} lJu^Bcrv
} {s0%XG1$