[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; {:;6 *W
} da'1H
int i1=l; J(>T&G;
int i2=mid+1; ;*(i}'
for(int cur=l;cur<=r;cur++){ Q Uy7Q$W
if(i1==mid+1) VEsIhjQ
data[cur]=temp[i2++]; )x5t']w`K
else if(i2>r) NJ^Bv`
data[cur]=temp[i1++]; Uv)B
else if(temp[i1] data[cur]=temp[i1++]; :MaP58dhh
else )WNw0cV}J>
data[cur]=temp[i2++]; "%(SLQOyy
} z!s1$5:"0
} po9f[/s'+o
TI/5'Oke$
} ]A=yj@o$xN
lxsn(- j
改进后的归并排序: Uee(1
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package org.rut.util.algorithm.support; c/lT S
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import org.rut.util.algorithm.SortUtil; ^]5^p9Jt"e
DuQW?9^232
/** v\lKY*@f
* @author treeroot g@zhhBtQ
* @since 2006-2-2 %63s(ekU
* @version 1.0 =28ZSo^
*/ (nu;o!mo9
public class ImprovedMergeSort implements SortUtil.Sort { M]Hf>7p
Na>w~
private static final int THRESHOLD = 10; FLo`EE":O(
-K (>uV!?
/* 4#,,_\r
* (non-Javadoc) mY[*(a
* p%R+c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q h{P>}
*/ :85QwN]\
public void sort(int[] data) { dv Vz#
int[] temp=new int[data.length]; L1#_
mergeSort(data,temp,0,data.length-1); .~C%:bDnX7
} s<+;5, Q|
T65"?=<EB
private void mergeSort(int[] data, int[] temp, int l, int r) { )(9[>_+40
int i, j, k; &+0?Xip{Z
int mid = (l + r) / 2; O\SH;y,N
if (l == r) a/</P |UG
return; }_BNi;H
if ((mid - l) >= THRESHOLD) VAo`R9^D#
mergeSort(data, temp, l, mid); |xF!3GGms
else &hUEOif
insertSort(data, l, mid - l + 1); yl&s!I
if ((r - mid) > THRESHOLD) kl1/(
mergeSort(data, temp, mid + 1, r); b<%c ]z
else aL*}@|JL"
insertSort(data, mid + 1, r - mid); Qz89=#W
c^rWS&)P
for (i = l; i <= mid; i++) { h=qT@)h1>
temp = data; "@^Q"RF
} &2Ef:RZF
for (j = 1; j <= r - mid; j++) { $;&l{=e2)
temp[r - j + 1] = data[j + mid]; ;b(ww{&
} t,n2N13
int a = temp[l]; xs&xcRR"
int b = temp[r]; mo+!79&
for (i = l, j = r, k = l; k <= r; k++) { %LM6=nt
if (a < b) { vN:!{)~z
data[k] = temp[i++]; ?6]B6
a = temp; F9Af{*Jw?x
} else { `kE7PXqa
data[k] = temp[j--]; :+ mULUi
b = temp[j]; 1]9w9!j
} (S4HU_,88
} 6$0<&')Yb
} 5dhy80|g]
6#AEVRJKU@
/** _Hd|y
* @param data B;S'l|-?
* @param l 4l{$dtKbI
* @param i A*vuSQt(
*/ 1Q!kk5jE
private void insertSort(int[] data, int start, int len) { yZ[=Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '9=b@SaAj
} m)LI| v
} fL#r@TB-s
} Aix6O=K6
} `N&*+!O%
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堆排序： &AOGg\
[& Z- *a
package org.rut.util.algorithm.support; PO8Z2"WI
-EE'xh-zD
import org.rut.util.algorithm.SortUtil; kG{};Vm
h_{f_GQ"
/** D(;+my2
* @author treeroot U<Tv<7`
* @since 2006-2-2 x.Egl4b3
* @version 1.0 [^?i<z{0C
*/ h`n '{s
public class HeapSort implements SortUtil.Sort{ g1|Pyt{
IG# wY
/* (non-Javadoc) k*n~&y:O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |(ab0b #
*/ LSA6*Q51
public void sort(int[] data) { 1Ml<>
MaxHeap h=new MaxHeap(); "?F[]8F.b
h.init(data); TIZ2'q5wg
for(int i=0;i h.remove(); Z$g'h1,zW
System.arraycopy(h.queue,1,data,0,data.length); 6u#eLs
} c+E\e]{
`kxC# &HO
private static class MaxHeap{ tM;cvc`/
YJMs9X~3
void init(int[] data){ Im\ ~x~{
this.queue=new int[data.length+1]; [8UZ5_1WL
for(int i=0;i queue[++size]=data; Tx~w(A4:
fixUp(size); Uz_p-J0
} _AFje
} Wz=& 0>Mm_
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private int size=0; ;l_b.z0^6
Jk-WD"J6
private int[] queue; F<4:P=
|9%~z0
public int get() { sZCK?
return queue[1]; |f @A-d X
} LwRzzgt
&"JC8
public void remove() { gJr)z7W'8
SortUtil.swap(queue,1,size--); gJX"4]Ol#}
fixDown(1); [n| }>
} $)"T9$>$
file://fixdown ~EY)c~H
private void fixDown(int k) { @,eo*
int j; F?R6zvive
while ((j = k << 1) <= size) { -rI7ihr*
if (j < size %26amp;%26amp; queue[j] j++; APF`b
if (queue[k]>queue[j]) file://不用交换 PdVx&BL*
break; {22ey`@`h
SortUtil.swap(queue,j,k); hG.}>(VV
k = j; D((/fT)eD
} jd ;)8^7K
} !{CIP`P1
private void fixUp(int k) { r3U7`P
while (k > 1) { 53:u6bb;
int j = k >> 1; ^_Lnqk6
if (queue[j]>queue[k]) yN{**?b
break; #&IrCq+
SortUtil.swap(queue,j,k); %A~. NNbS
k = j; xjU0&
} g]HxPq+O
} nbP}a?XC
6wB !dl
} V.u^;gr3
89D`!`Ah]
} rwUhNth-Qh
85io%>&0
SortUtil： P;25F
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package org.rut.util.algorithm; I:=!,4S;
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import org.rut.util.algorithm.support.BubbleSort; @(a~p
import org.rut.util.algorithm.support.HeapSort; >BO!jv!a
import org.rut.util.algorithm.support.ImprovedMergeSort; b_{+OqI
import org.rut.util.algorithm.support.ImprovedQuickSort; e[T3,2C
import org.rut.util.algorithm.support.InsertSort; |AvsT{2
import org.rut.util.algorithm.support.MergeSort; h6LjReNo
import org.rut.util.algorithm.support.QuickSort; sOWP0xY
import org.rut.util.algorithm.support.SelectionSort; K ~\b+
import org.rut.util.algorithm.support.ShellSort; Uhh[le2 %
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/** 0W6='7
* @author treeroot ?cz7s28a
* @since 2006-2-2 %iIr %P?
* @version 1.0 $?kTS1I(
*/ lp$,`Uz`
public class SortUtil { aF"PB h=
public final static int INSERT = 1; L~|_)4
public final static int BUBBLE = 2; T[},6I|!
public final static int SELECTION = 3; NODE`VFu
public final static int SHELL = 4; tx1TtWo
public final static int QUICK = 5; tJd/uQJ
public final static int IMPROVED_QUICK = 6; I %1P:-
public final static int MERGE = 7; w{;bvq%lY
public final static int IMPROVED_MERGE = 8; GF<SQHL,
public final static int HEAP = 9; P1TTaYu
Jn?ZJZ
public static void sort(int[] data) { m7>)p]]
sort(data, IMPROVED_QUICK); f]Z9=
} 6 ;\>,
private static String[] name={ W}(xE?9&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v%c--cO(S4
}; JKYl
Jn0L_@
private static Sort[] impl=new Sort[]{ B$97"$#u
new InsertSort(), 5iItgVTW
new BubbleSort(), k lr1"q7
new SelectionSort(), M|z4Dy
new ShellSort(), +>mU4Fwp
new QuickSort(), It'PWqZtG
new ImprovedQuickSort(), Vc|QW
new MergeSort(), n)]u|qq
new ImprovedMergeSort(), m<4tH5};d
new HeapSort() z{> )'A/
}; J]*?_>"#8
]'i}}/}u2
public static String toString(int algorithm){ #)%dG3)e
return name[algorithm-1]; -Ze2]^#dl
} <^A1.o<GN
5=_))v<Tp
public static void sort(int[] data, int algorithm) { g9gyx/'*
impl[algorithm-1].sort(data); QfU{W@!h
} c$%I^f}'
@JD!.3
public static interface Sort { Mg^3Y'{o
public void sort(int[] data); -S}^b6WL
} 2I~a{:O
V@ph.)z
public static void swap(int[] data, int i, int j) { AUkePp78
int temp = data; r?n3v[B
data = data[j]; 9d,2d5Y
data[j] = temp; :+S~N)0j^
} ivl_=
} `>}e 5