[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; M"Dv-#f
} L4DT*(;!E
int i1=l; M*!WXQlud
int i2=mid+1; xXf,j#`"
for(int cur=l;cur<=r;cur++){ .n n&K}h
if(i1==mid+1) Ff{,zfN+3
data[cur]=temp[i2++]; BLN|QaZ
else if(i2>r) dGyrzuPJ
data[cur]=temp[i1++]; D@2L<!\
else if(temp[i1] data[cur]=temp[i1++]; arIEd VfNa
else Gv[s86AP,
data[cur]=temp[i2++]; 1=Z!ZY}}e
} 7s0\`eXo/
} y'aK92pF:
cX!C/`ew>
} q9:g
=oBlUE
改进后的归并排序: rD+mI/_J`
VV;%q3}:
package org.rut.util.algorithm.support; Rk,'ujc
beaSvhPU
import org.rut.util.algorithm.SortUtil; =t^jlb
O1D|T"@
/** rFUR9O.{E
* @author treeroot }* \*<d 3
* @since 2006-2-2 ,ZghV1z
* @version 1.0 MaPOmS8?
*/ fat;5XL@
public class ImprovedMergeSort implements SortUtil.Sort { @ ]40xKF
f8 BZkh
private static final int THRESHOLD = 10; E!'6vDVC:
[~PR\qm
/* Ur]/kij
* (non-Javadoc) 6P3h955c
* ~-<MoCm!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2X<%BFsE
*/ %x.du9
public void sort(int[] data) { ]1FLG*sB
int[] temp=new int[data.length]; 0 N"N$f
mergeSort(data,temp,0,data.length-1); 'W,*mfB
} j7U&a}(
PB *v45
private void mergeSort(int[] data, int[] temp, int l, int r) { []v$QR&u#v
int i, j, k; 2eHVl.C5
int mid = (l + r) / 2; qu1+.z=|
if (l == r) V@g v
return; nK32or3
if ((mid - l) >= THRESHOLD) /ej[oR
mergeSort(data, temp, l, mid); NVghkd
else CY*o"@-o5)
insertSort(data, l, mid - l + 1); -)Bvx>8fq-
if ((r - mid) > THRESHOLD) MVnN0K4
mergeSort(data, temp, mid + 1, r); >23$_'2
else Nc&J%a
insertSort(data, mid + 1, r - mid); #}Yrxf
-#v1/L/=
for (i = l; i <= mid; i++) { x3g4r_
temp = data; J/fnSy
} @I}VD\pF
for (j = 1; j <= r - mid; j++) { GGnlkp& E
temp[r - j + 1] = data[j + mid]; /o%VjP"<
} obE8iG@H
int a = temp[l]; }zks@7kf
int b = temp[r]; Unv'm5/L
for (i = l, j = r, k = l; k <= r; k++) { L2+cVR
if (a < b) { y>.t[*zT
data[k] = temp[i++]; ;DSH$'1i
a = temp; y=c={Qz@vn
} else { gyMHC{l/B
data[k] = temp[j--]; ]=VRct "
b = temp[j]; Gbjh|j=
} :_y!p
} N2k<W?wQ
} .dMdb7
V*ao@;sD
/** 76"4Q!
* @param data r<vy6
* @param l 3<Zp+rD
* @param i xu_,0ZT]{
*/ 'B{FRK
private void insertSort(int[] data, int start, int len) { 3:MJKS02OD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5VP0Xa ~
} ;}iB9 Tl
} ff5 gE'
} z~X/.>
} ymyzbE
g9q}D-
堆排序： O>pv/Ns
^ZO! (
package org.rut.util.algorithm.support; Nf^<pT[*
%s"&|32
import org.rut.util.algorithm.SortUtil; C+uW]]~I)
9sT5l"?g
/** $:%E<j4Dn
* @author treeroot }04mJY[
* @since 2006-2-2 JLnv O
* @version 1.0 w8>h6x"
*/ OtoM
public class HeapSort implements SortUtil.Sort{ );':aXj
DrKB;6
/* (non-Javadoc) uf90
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iX6>u4~(
*/ Vn4wk>b}$2
public void sort(int[] data) { :u./"[G
MaxHeap h=new MaxHeap(); GE(~d'
h.init(data); 3PGAUQR#"q
for(int i=0;i h.remove(); _<LL@IX
System.arraycopy(h.queue,1,data,0,data.length); @U18Dj[
} A $gn{ c
8'zZVX D<
private static class MaxHeap{ y7M{L8{0
z,4mg6gt
void init(int[] data){ '{UKO7
this.queue=new int[data.length+1]; ] re=8s6
for(int i=0;i queue[++size]=data; E#!!tH`lgg
fixUp(size); _ Lb"yug
} gr*CN<
} ;5bd<N
v8*)^-Fx
private int size=0; i-Rn,}v
6ki2/ Q
private int[] queue; ^APtV6g
xy[#LX)RW
public int get() { 29,ET}~
return queue[1]; IGcq*mR=
} <-!1`@l>
/O}<e TR
public void remove() { s{Y4wvQyB
SortUtil.swap(queue,1,size--); '1:)q
fixDown(1); WN+i3hC
} !Fp%2gt|
file://fixdown d(o=)!p
private void fixDown(int k) { A}SGw.3
int j; 0o=HOCL\
while ((j = k << 1) <= size) { ^"X.aksA
if (j < size %26amp;%26amp; queue[j] j++; U_(>eVi7F
if (queue[k]>queue[j]) file://不用交换 qU7_%Z
break; iCF},W+
SortUtil.swap(queue,j,k); Y@0'0
k = j; SOhM6/ID2/
} ^ *"fC
} ^iMr't\b
private void fixUp(int k) { WHY/x /$
while (k > 1) { B={_}f
int j = k >> 1; Q2VF+g,
if (queue[j]>queue[k]) o=3hWbe
break; b$7]cE
SortUtil.swap(queue,j,k); 3$nK
k = j; ^obuMQ;
} 9pqsr~
} Bi:lC5d5?
din,yHu~
} ?b,>+v-w::
&2y4k"B&)
} ::oFL#+
Kd`(^
SortUtil： e~SK*vR%]
fz=?QEG
package org.rut.util.algorithm; {siOa%;*
G kjfDY:
import org.rut.util.algorithm.support.BubbleSort; 172G
import org.rut.util.algorithm.support.HeapSort; 8|i'~BFHs
import org.rut.util.algorithm.support.ImprovedMergeSort; 4w^o !
import org.rut.util.algorithm.support.ImprovedQuickSort; yV!4Im.>
import org.rut.util.algorithm.support.InsertSort; Cy]=Y
import org.rut.util.algorithm.support.MergeSort; IC0L&;En
import org.rut.util.algorithm.support.QuickSort; dT|f<E/P
import org.rut.util.algorithm.support.SelectionSort; CaJ-oy8
import org.rut.util.algorithm.support.ShellSort; P35DVKS
Dcvul4Q
/** tk%f_"}
* @author treeroot `FMo;,j
* @since 2006-2-2 'w+]kt-
* @version 1.0 'dwT&v]@
*/ -I|xW
public class SortUtil { 0N,<v7PX
public final static int INSERT = 1; [Cl0Kw.LD
public final static int BUBBLE = 2; JpC'(N
public final static int SELECTION = 3; 7y'":1
public final static int SHELL = 4; R&Y_
public final static int QUICK = 5; < '5~p$
public final static int IMPROVED_QUICK = 6; HY)xT$/J
public final static int MERGE = 7; <:v+<)K
public final static int IMPROVED_MERGE = 8; ! I@w3`
public final static int HEAP = 9; KS$t
_6NUtU
public static void sort(int[] data) { K3?5bT_{
sort(data, IMPROVED_QUICK); Y<xqws
} S/'0czDMW
private static String[] name={ a;HAuy`M x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E5&Z={
}; :(n<c
I}4 PB+yu
private static Sort[] impl=new Sort[]{ =Z^5'h~
new InsertSort(), Y@+Rb
new BubbleSort(), ;5j|B|v
new SelectionSort(), %":3xj'EEI
new ShellSort(), IL].!9
new QuickSort(), o&?c,FwN
new ImprovedQuickSort(), <b:%o^
new MergeSort(), Hb=#`
new ImprovedMergeSort(), jSY[Y:6md
new HeapSort() 1>J.kQR^
}; ~rb0G*R>
P8d
public static String toString(int algorithm){ +~^S'6yB
return name[algorithm-1]; n[3z_QI
} Qg*\aa94
0\dmp'j]
public static void sort(int[] data, int algorithm) { .EKlw##
impl[algorithm-1].sort(data); m-AF&( ;K
} 2LwJ%!
]@&X*~c^Z
public static interface Sort { DKIH{:L7
public void sort(int[] data); F0:]@0>r
} aA`eKy) \
J2=4%#R!
public static void swap(int[] data, int i, int j) { l00i2w
int temp = data; b#6S8C+@
data = data[j]; *G58t`]r
data[j] = temp; 4D?h}U /
} g3tE.!a5-
} w]wZJ/U`