[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; ?@3&dk~ni
} DM'qNgB7
int i1=l; J|q^+K
int i2=mid+1; M5 `m.n<
for(int cur=l;cur<=r;cur++){ gY%&IHQ'
if(i1==mid+1) xx0k$Dqt2I
data[cur]=temp[i2++]; ~v\hIm3=m
else if(i2>r) 3&9zGy{V+
data[cur]=temp[i1++]; pw;r 25
else if(temp[i1] data[cur]=temp[i1++]; B0"0_n7-
else :ol6%Z's
data[cur]=temp[i2++]; _25d%Ne0
} VY_f =
} ArL-rJ{}
RF!'K ko
} tIp{},bQ^
e2bLkb3c
改进后的归并排序: ?UJSxL
Q]T BQ&
package org.rut.util.algorithm.support; n.I2$._(b
J[6VBM.Y
import org.rut.util.algorithm.SortUtil; Ph Ttx(!
0+|>-b/%
/** AI~9m-,mE
* @author treeroot *(p7NYf1
* @since 2006-2-2 ke^d8Z.
* @version 1.0 q-H&5K
*/ yYk|YX(7U
public class ImprovedMergeSort implements SortUtil.Sort { w#<p^CS
'{CWanTPi
private static final int THRESHOLD = 10; .8x@IWJD
m\?\6Wk
/* fzyzuS$
* (non-Javadoc) k{1b20
* R|-j]Ne
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^6#-yDZC@
*/ L W?&a3e
public void sort(int[] data) { /L$NE$D} "
int[] temp=new int[data.length]; !")WZq^`
mergeSort(data,temp,0,data.length-1); vU{jda$$#
} VRB~7\A5<)
716hpj#*
private void mergeSort(int[] data, int[] temp, int l, int r) { RJLFj
int i, j, k; Y6a$gXRT
int mid = (l + r) / 2; Op90NZI#K
if (l == r) E)Srj~$d
return; YLigP"*~^
if ((mid - l) >= THRESHOLD) .5NZf4:C
mergeSort(data, temp, l, mid); &#Wkww&Y
else /xJY7yF
insertSort(data, l, mid - l + 1); $^ubo5%
if ((r - mid) > THRESHOLD) YMK>+y[+4
mergeSort(data, temp, mid + 1, r); "d2LyQy
else YY\Rua/nG
insertSort(data, mid + 1, r - mid); VD9J}bgJ
#]igB9Cf)w
for (i = l; i <= mid; i++) { $M-NR||k
temp = data; T*8_FR<
} ZRUh/<\[
for (j = 1; j <= r - mid; j++) { ?N(u4atC
temp[r - j + 1] = data[j + mid]; Y6+k9$h
} o3fR3P%$
int a = temp[l]; BjN{@aEO
int b = temp[r]; ThbP;CzI#
for (i = l, j = r, k = l; k <= r; k++) { lR,G;
if (a < b) { wD}EW
data[k] = temp[i++]; #c:9V2
a = temp; 9wzg{4/-$
} else { +H[Q~P8'[
data[k] = temp[j--]; Y5Ft96o))x
b = temp[j]; > e;]mU`,
} sBbL~ce50?
} 8.PXTOhVL
} H RWZ0 '
o%$<LaQG5
/** n|J.)E.
* @param data cj`#Tg.
* @param l HK^a:BI
* @param i #DrZ`Aq
*/ t&8<k+m
private void insertSort(int[] data, int start, int len) { #wGQv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xu`d`!Tx
} N"&$b_u[
} t7sUtmq
} _T_PX$B
} 2lX[hFa5
>aX:gN
堆排序： 3x,Aczb
#/\pUK~km
package org.rut.util.algorithm.support; O7!fI'R
Xqc'R5Cw
import org.rut.util.algorithm.SortUtil; S83]O!w0
Jii?r*"d
/** R (t!xf
* @author treeroot Q9Q!9B@
* @since 2006-2-2 'O!Z:-qE
* @version 1.0 V< 2IIH5^
*/ QJ[(Y@ O6a
public class HeapSort implements SortUtil.Sort{ _G_ &Me0
0G+L1a-
/* (non-Javadoc) c_R)P,P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L3-<Kop
*/ 50}.Xm@,BO
public void sort(int[] data) { p,3go[9X:R
MaxHeap h=new MaxHeap(); ^yzo!`)fso
h.init(data); !"Z."fm*
for(int i=0;i h.remove(); ex0 kb
System.arraycopy(h.queue,1,data,0,data.length); ~gSF@tz@
} uzat."`d'
H>gWxJ 5
private static class MaxHeap{ KIXwx98
6,CU)-98G
void init(int[] data){ Fh*q]1F
this.queue=new int[data.length+1]; ux"D ]P
for(int i=0;i queue[++size]=data; Ek gZxT_&
fixUp(size); P_:?}h\
} c,b`N0dOKL
} bxPY'&
;EE{~
private int size=0; #QJ4o_
=B3!jir
private int[] queue; $1Q3Y'Q9
)]0[`iLe
public int get() { 'l0eo' K
return queue[1]; M]%!n3Fb
} Bd N{[2
0+VncL)u
public void remove() { (;Dn%kK
SortUtil.swap(queue,1,size--); OuYE-x2]x"
fixDown(1); ;T"m[D
} `uaD.m$EJ
file://fixdown os"[Iji
private void fixDown(int k) { `-9*@_-=M
int j; 0pZ.; /<{
while ((j = k << 1) <= size) { g'd*TBnk
if (j < size %26amp;%26amp; queue[j] j++; .:r2BgL
if (queue[k]>queue[j]) file://不用交换 cLN[o8ZU
break; Qw{\sCH>
SortUtil.swap(queue,j,k); .SRuyioF&
k = j; a|]%/[G@
} OyG_thX
} toYg$IV
private void fixUp(int k) { q~:'R
while (k > 1) { ;/hH=IT
int j = k >> 1; ~(l2%(3G
if (queue[j]>queue[k]) O>o}<t7
break; c9cphZ(z
SortUtil.swap(queue,j,k); ;s!ns N
k = j; J _[e9
} ; ei<Q =[
} >X\s[d&(
|=h)efo}
} #P,[fgNy
dWq/)%@t
} R>YMGUH~w
7}iewtdy,
SortUtil： 4 L~;>]7
6{Cu~G{]N
package org.rut.util.algorithm; kgbr+Yw2X
IW] 841
import org.rut.util.algorithm.support.BubbleSort; '@}?NV0
import org.rut.util.algorithm.support.HeapSort; -XDP-Trk
import org.rut.util.algorithm.support.ImprovedMergeSort; Ymk4Cu.s
import org.rut.util.algorithm.support.ImprovedQuickSort; .xc/2:m9
import org.rut.util.algorithm.support.InsertSort; 61Iy{-/ZV
import org.rut.util.algorithm.support.MergeSort; ~jRk10T(B
import org.rut.util.algorithm.support.QuickSort; @qr3v>3X<
import org.rut.util.algorithm.support.SelectionSort; nm:let7GB
import org.rut.util.algorithm.support.ShellSort; Ow .)h(y/
+<9q]V
/** ]Buk9LTe
* @author treeroot ,h(f\h(9
* @since 2006-2-2 MIXrLh3
* @version 1.0 J^+$L"K
*/ C&s }m0R
public class SortUtil { Qig!NgOM
public final static int INSERT = 1; HV.|Eh_7
public final static int BUBBLE = 2; w2C!>fJ]1
public final static int SELECTION = 3; id[>!fQ=Y
public final static int SHELL = 4; 1n5e^'z
public final static int QUICK = 5; !y2h`ZAZ
public final static int IMPROVED_QUICK = 6; r|H!s,
public final static int MERGE = 7; 4Uy>#IL
public final static int IMPROVED_MERGE = 8; &+w!'LSaD
public final static int HEAP = 9; 3=L1HZH
q$2taG}
public static void sort(int[] data) { WSB|-Qj}W
sort(data, IMPROVED_QUICK); bHo?Rw!.
} nKa;FaJ
private static String[] name={ ~\s &]L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #uw*8&%0
}; rM~IF+f0XD
uY%3X/^j
private static Sort[] impl=new Sort[]{ ^~1@HcJo
new InsertSort(), qA_DQ):
new BubbleSort(), }lvP|6Y: y
new SelectionSort(), WxP4{T* <
new ShellSort(), 4}YT@={g}
new QuickSort(), :IKp7BS
new ImprovedQuickSort(), *CD=cmdD*
new MergeSort(), %fSk "%u%<
new ImprovedMergeSort(), n\)f.}YD8d
new HeapSort() !I+u/f?TO7
}; McI4oD~"
]{,=mOk
public static String toString(int algorithm){ OZ]3OL,
return name[algorithm-1]; s#Y7*?Sm
} S5 oHe4#89
x=r6vOj
public static void sort(int[] data, int algorithm) { `2U/O .rV
impl[algorithm-1].sort(data); ~#x!N=q
} `2~Ea_Z
G uI sM
public static interface Sort { bL#TR;*]
public void sort(int[] data); E|}Nj}(*
} .4)P=*
WW/m /+
public static void swap(int[] data, int i, int j) { }pZnWK+
int temp = data; VrL>0d&d
data = data[j]; 2x J5
data[j] = temp; ]6 7wk
} g}j>;T
} qO'5*d;!d