[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; ~Xw?>&
} D|:sSld @
int i1=l; .Tv(1HAc2l
int i2=mid+1; 9#6/c
for(int cur=l;cur<=r;cur++){ r ngw6?`n-
if(i1==mid+1) V5r7eC
data[cur]=temp[i2++]; 6Qu*'
else if(i2>r) `p|vutk)U
data[cur]=temp[i1++]; >#|Yoc
else if(temp[i1] data[cur]=temp[i1++]; EPRs%(w`
else w\*/(E<:
data[cur]=temp[i2++]; FJ"9Hs2
} dR:iUw:V
} KLW+&.re8
AoeW<}MO
} &N0|tn
v{Vesf
改进后的归并排序: ,ua1xsZl&
7`!( 8
package org.rut.util.algorithm.support; ]H2aYi$
$t}1|q|
import org.rut.util.algorithm.SortUtil; ,[L$
1}*;
/** %m3efaC
* @author treeroot p>S/6 [X
* @since 2006-2-2 3PffQ,c[~
* @version 1.0 Z+(V \
*/ xltu g##
public class ImprovedMergeSort implements SortUtil.Sort { x~eEaD5m%J
$uhDBmb
private static final int THRESHOLD = 10; zK?[dO
p04+"
/* "cM5=;
* (non-Javadoc) G- WJlu
* I_7EfAqg(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) It-*CD9
*/ LP /4e`
public void sort(int[] data) { fM.|#eLi
int[] temp=new int[data.length]; k^jCB>b
mergeSort(data,temp,0,data.length-1); s#ZH.z@J
} _9r{W65s
@x +#ZD(
private void mergeSort(int[] data, int[] temp, int l, int r) { Mk?I}
int i, j, k; Lm#d.AD)
int mid = (l + r) / 2; F-0PmO~3+W
if (l == r) or`stBx
return; |'_<(z
if ((mid - l) >= THRESHOLD) [rU8 #4.
mergeSort(data, temp, l, mid); g1,
else Uiw7Y\Im|
insertSort(data, l, mid - l + 1); :X*LlN
if ((r - mid) > THRESHOLD) i{qURP}.
mergeSort(data, temp, mid + 1, r); !3# }ZC2
else puF Z~WZ
insertSort(data, mid + 1, r - mid); ]{^vs'as\
\l5:A]J
for (i = l; i <= mid; i++) { ]i2\2MTW8
temp = data; (=V[tI+Ngt
} A8GlE
for (j = 1; j <= r - mid; j++) { 3>v0W@C
temp[r - j + 1] = data[j + mid]; *DzPkaYD>
} Dj(7'jT
int a = temp[l]; Pc==]H(
int b = temp[r]; _1Gut"!{\
for (i = l, j = r, k = l; k <= r; k++) { @8yFM%
if (a < b) { *!@x<Hf<
data[k] = temp[i++]; tC-KW~&
a = temp; kZ%W?#
} else { %tQ{Hf~
data[k] = temp[j--]; _!p3M3"$B
b = temp[j]; ~1sl.8tF
} A"iD4Q
} $uynW3h
} u6T?oK9j
% 6.jh#C
/** U-<"i6mg?
* @param data !5!$h`g
* @param l olxP`iK
* @param i Nn1^#kc
*/ RGI6W{\
private void insertSort(int[] data, int start, int len) { @A'1D@f#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e/jM+%
} rd4'y~#S
} yt:V+qdv
} 5>Yd\(`K
} gi@ji-10
q.km>XRk~
堆排序： N~_jiVD>
Cbs4`D,
package org.rut.util.algorithm.support; ?^4sE-C6
IkNt! 2s_
import org.rut.util.algorithm.SortUtil; wQB{K3
N2s%p6RMPD
/** 6'!{0 5=m
* @author treeroot =2)t1 H
* @since 2006-2-2 9yw/-nA
* @version 1.0 pu*u[n
*/ 8w?\_P7QA
public class HeapSort implements SortUtil.Sort{ ;I71_>m
MPy][^s!
/* (non-Javadoc) E9 q;>)}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D#}Yx]Q1
*/ Am0C|(#Xm
public void sort(int[] data) { K(fLqXE%
MaxHeap h=new MaxHeap(); g_c)Ts(
h.init(data); bv>lm56
for(int i=0;i h.remove(); jZ,[{Z(N
System.arraycopy(h.queue,1,data,0,data.length); a;(zH*/XK
} JMlhBh
utJVuJw:t
private static class MaxHeap{ #(g+jb0E
b7sE
void init(int[] data){ m>dcb 6B+g
this.queue=new int[data.length+1]; y]f^`2L!8>
for(int i=0;i queue[++size]=data; fYM6wYJ
fixUp(size); ey\{C`(__y
} UZXcKl>u
} 8'WMspX
f<altz_\q
private int size=0; rtmt3
k&iScMgCTH
private int[] queue; 4{WV
U]U)'
public int get() { L^{;jgd&T9
return queue[1]; 7P^{*!
} mKQST ]5
*u;">H*BW
public void remove() { :_,]?n
SortUtil.swap(queue,1,size--); "u8o?8+q~
fixDown(1); i)PV{3v$J
} %g@3S!lK
file://fixdown 'qF3,Rw
private void fixDown(int k) { wW! r}I#
int j; X+E\]X2
while ((j = k << 1) <= size) { Dke($Jr{
if (j < size %26amp;%26amp; queue[j] j++; 6aZt4Lw2\
if (queue[k]>queue[j]) file://不用交换 yki51rOI*
break; 3_*Xk. .d
SortUtil.swap(queue,j,k); Etc?;Z[F#
k = j; (X_,*3Yxk
} .>64h H
} &}6ES{Nr8
private void fixUp(int k) { M:UB>-`bW
while (k > 1) { m|2]lb
int j = k >> 1; $< K)fbG
if (queue[j]>queue[k]) hN:F8r+DG
break; 5ZyBP~
SortUtil.swap(queue,j,k); ) UDJ[pL@
k = j; avt>saR
} ~{,vg4L
} j YIV^o 0
:e<`U~8m
} Tb0;Mbr
x1V2|~;p|
} !Xx<~lIC
hp]ng!I{\u
SortUtil： +fP/|A8P
v;bP8)mI
package org.rut.util.algorithm; 3ES[ N.V#
jo;uRl
import org.rut.util.algorithm.support.BubbleSort; ZG/8Ds
import org.rut.util.algorithm.support.HeapSort; Ei9_h
import org.rut.util.algorithm.support.ImprovedMergeSort; i B!hEbz
import org.rut.util.algorithm.support.ImprovedQuickSort; =Kt9,d08x
import org.rut.util.algorithm.support.InsertSort; ]O7.ss/2
import org.rut.util.algorithm.support.MergeSort; Ns!3- Y
import org.rut.util.algorithm.support.QuickSort; qM1)3.)[:
import org.rut.util.algorithm.support.SelectionSort; V)1:LLRW
import org.rut.util.algorithm.support.ShellSort; yg+IkQDf4U
0gOrW=
/** "?eH=!
* @author treeroot cR=94i=t
* @since 2006-2-2 =yTa,PY
* @version 1.0 `zzKD2y
*/ FSU%?PxO
public class SortUtil { 0ve`
public final static int INSERT = 1; ( ztim
public final static int BUBBLE = 2; =2nn "YVP
public final static int SELECTION = 3; n,?IcDU~m
public final static int SHELL = 4; OSa}8rlr'
public final static int QUICK = 5; 4Ay`rG
public final static int IMPROVED_QUICK = 6; xjK_zO*dLq
public final static int MERGE = 7; ^#BGA|j
public final static int IMPROVED_MERGE = 8; % L >#
public final static int HEAP = 9; "0'*q<8
\>Ga-gv6/
public static void sort(int[] data) { 5@UC c
sort(data, IMPROVED_QUICK); uh5Pn#da^
} Clt5
private static String[] name={ ,jbGM&.C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %0NkIQ`C
}; 6@?aVM~
5w,Z7I8
private static Sort[] impl=new Sort[]{ G !1~i*P$u
new InsertSort(), &>W (l.
new BubbleSort(), fKTDt%
new SelectionSort(), i+)}aA
new ShellSort(), 9QH9gdiw
new QuickSort(), +dCDM1{_a
new ImprovedQuickSort(), xBL$]>
new MergeSort(), b'7z DZI]
new ImprovedMergeSort(), |k`f/*
new HeapSort() *,W!FxJ
}; c/<Sa|'
$"sq4@N
public static String toString(int algorithm){ g=FDm*
return name[algorithm-1]; 5?5-;H
} =&q-[JW
FJ{,=@
public static void sort(int[] data, int algorithm) { n^iNo
impl[algorithm-1].sort(data); z/Ns5
} >~5lYD
g|K6iY
public static interface Sort { *2,e=tY>
public void sort(int[] data); ^"O{o8l>2
} (# 6<k
.~.``a
public static void swap(int[] data, int i, int j) { pHen>BA[
int temp = data; }XX~ W}M(\
data = data[j]; 4d^ \l!
data[j] = temp; MX!u$ei
} EjR_-8@FK
} sK`~Csb iB