[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; Pt3[|4L
} `Wwh`]#"~d
int i1=l; 3GWrn,f
int i2=mid+1; u@"o[e':
for(int cur=l;cur<=r;cur++){ ty;o&w$
if(i1==mid+1) aT/KT,!
data[cur]=temp[i2++]; ,(hY%M&\
else if(i2>r) KS>Fl->
data[cur]=temp[i1++]; 2wOy}:
else if(temp[i1] data[cur]=temp[i1++]; I;iR(Hf)?q
else lWl-@*'
data[cur]=temp[i2++]; w})NmaT;YF
} `hF;$
} g Np-f
\R;K>c7=
} @5*xw1B
w2<*$~C]
改进后的归并排序: 4O Zy&,
&x/k^p=
package org.rut.util.algorithm.support; Y=WR6!{
gx&73f<J
import org.rut.util.algorithm.SortUtil; #y`k$20"
e6es0D[>5
/** - coy@S=.'
* @author treeroot ]*h&hsS0
* @since 2006-2-2 |x[$3R1@
* @version 1.0 r2)pAiTM*
*/ bn|DRy
public class ImprovedMergeSort implements SortUtil.Sort { A@{ !:_55
][N) 2_^M
private static final int THRESHOLD = 10; /op/g]O}
RQJ9MGw
/* .hnF]_QQ
* (non-Javadoc) .kzms
* 9w$7VW;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ty iU1,oO
*/ [EcV\.
public void sort(int[] data) { 4}PeP^pj
int[] temp=new int[data.length]; K+t];(
mergeSort(data,temp,0,data.length-1); 0wYiu
} n%8#?GC`
)muv;Rf`e5
private void mergeSort(int[] data, int[] temp, int l, int r) { vD"_X"v
int i, j, k; nvwDx*[qN
int mid = (l + r) / 2; J4&XPr9
if (l == r) 8Y]}Gb!
return; BfEx'C
if ((mid - l) >= THRESHOLD) k4*! Q_A
mergeSort(data, temp, l, mid); v,@E}F~-f1
else zh hGqz[K
insertSort(data, l, mid - l + 1); hG[4O3jo\
if ((r - mid) > THRESHOLD) f#2#g%x
mergeSort(data, temp, mid + 1, r); /TG| B Eb
else 2w;G4
insertSort(data, mid + 1, r - mid); gtl;P_
aSxG|OkKy
for (i = l; i <= mid; i++) { Ny[s+2?
temp = data; "Vq@bNtu+
} k.h^ $f
for (j = 1; j <= r - mid; j++) { olslzXn7o
temp[r - j + 1] = data[j + mid]; +&zb^C`J
} !cv6 #:
int a = temp[l]; lP-kZA!
int b = temp[r]; orK+B4
for (i = l, j = r, k = l; k <= r; k++) { SSo~.)J
if (a < b) { xBt4~q;#sE
data[k] = temp[i++]; xg4T` ])
a = temp; }$&);7(w
} else { [cY?!Qd0
data[k] = temp[j--]; +,:nm_kQU
b = temp[j]; W=!F8g|Qz
} W=(MsuirO
} ~m3V]v(q7
} @ICejB<
=k_XKxd
/** 23,%=U
* @param data 1@s^$fvW
* @param l y`T--v3mI
* @param i Y|Nfwqz
*/ a'o}u,e5
private void insertSort(int[] data, int start, int len) { ,OFq'}q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /"g[Ay
} 4/ 0/#G#j
} +YkmLD
} v_[)FN"]Y.
} F?!};~$=Z
fB@K'JQG
堆排序： $a)JCErN
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package org.rut.util.algorithm.support; :K!GR
(0Zrfu^
import org.rut.util.algorithm.SortUtil; `,hW;p>-
5>0\e_V
/** 0]/,m4a#n
* @author treeroot 0#2T0zk
* @since 2006-2-2 xop-f#U*
* @version 1.0 BvNl?A@]A
*/ v[p/c.p?i
public class HeapSort implements SortUtil.Sort{ {-:4O\/
wi![0IE )
/* (non-Javadoc) ~Tpe,juG_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &zaW"uy3T
*/ o9DYr[
public void sort(int[] data) { ~pDRF(
MaxHeap h=new MaxHeap(); m1M;'tT@
h.init(data); u-]vK
for(int i=0;i h.remove(); g!~-^_F
System.arraycopy(h.queue,1,data,0,data.length); $4#=#aKW.
} <yPq;#z(!
- I1cAt
private static class MaxHeap{ 5e~ j
v3=&{}+j.
void init(int[] data){ ?HEo9/ *7
this.queue=new int[data.length+1]; #VP-T; Ahe
for(int i=0;i queue[++size]=data; -k|g04Q?
fixUp(size); QE`:jxyad
} ~4p]E'b
} VNJDl
Rh05W_?Js
private int size=0; 2^k^"<h5j
Dohl,d
private int[] queue; jpPdjQ
oho AUT
public int get() { ZEXj|wC
return queue[1]; +8?R+0P
} o`JlXuG?o
vfk7J5y
public void remove() { ?Oe_} jv;
SortUtil.swap(queue,1,size--); ~jgN_jz
fixDown(1); T<9dW?'|
} kHz+ZY<?
file://fixdown A>ug'.
private void fixDown(int k) { XSL t;zL:
int j; +S:u[x
while ((j = k << 1) <= size) { dvrvpDoE.
if (j < size %26amp;%26amp; queue[j] j++; 5Xq.=/eX
if (queue[k]>queue[j]) file://不用交换 8k*
break; hSLwiX~
SortUtil.swap(queue,j,k); P?yOLG+)l)
k = j; WsK"^"Z
} @[[Cs*-
} |zRoXO`]-*
private void fixUp(int k) { h>mBkJ {
while (k > 1) { 7><* 9iOW
int j = k >> 1; r7wx?{~ 28
if (queue[j]>queue[k]) wXIe5
break; 2s]]!{Z#
SortUtil.swap(queue,j,k); f0HV*%8
k = j; 3f7t%
} }tl8(kjm
} KNUMz4
\M3NasZ
} /4f 5s#hR
pRDON)$
} leX7(Y;!a7
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SortUtil： qQ?,|4)y
*BP\6"X
package org.rut.util.algorithm; 1z$}*`
u\Erta`
import org.rut.util.algorithm.support.BubbleSort; Fc{6*wtO
import org.rut.util.algorithm.support.HeapSort; [/#k$-
import org.rut.util.algorithm.support.ImprovedMergeSort; {TcbCjyw
import org.rut.util.algorithm.support.ImprovedQuickSort; $.x?in|_
import org.rut.util.algorithm.support.InsertSort; PL$(/Z
import org.rut.util.algorithm.support.MergeSort; !m/Dd0
import org.rut.util.algorithm.support.QuickSort; v2W"+QS}u
import org.rut.util.algorithm.support.SelectionSort; Ej{eq^n
import org.rut.util.algorithm.support.ShellSort; %+j]vP
$'I$n
/** 41fm}
* @author treeroot (VF4FC
* @since 2006-2-2 V~gUMu4ot
* @version 1.0 ZF11v(n
*/ #k|g9`
public class SortUtil { }IalgQ(i
public final static int INSERT = 1; \Im\*A
public final static int BUBBLE = 2; fv 1!^CDia
public final static int SELECTION = 3; +oKpA\mz
public final static int SHELL = 4; VEdnP+D
public final static int QUICK = 5; ovBd%wJ 0
public final static int IMPROVED_QUICK = 6; Nf?, _Rl
public final static int MERGE = 7; VdN+~+A:
public final static int IMPROVED_MERGE = 8; T\b";+!W
public final static int HEAP = 9; ?T%K +
+ke42Jwt
public static void sort(int[] data) { =ty@xHr
sort(data, IMPROVED_QUICK); M$5%QM}
} lLwQridFXh
private static String[] name={ \`iW__
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r+W8m?oi
}; 9rvxp;
KohQ6q
private static Sort[] impl=new Sort[]{ *"9)a6T t+
new InsertSort(), jP7+s.j>
new BubbleSort(), %imBGh
new SelectionSort(), S|5lx7
new ShellSort(), HDae_.
new QuickSort(), .WPR}v,.Z
new ImprovedQuickSort(), kl{OO%jZ
new MergeSort(), `b'|FKc]
new ImprovedMergeSort(), Q17o5##x7
new HeapSort() W;AWO0+
}; Q!A3hr$IF
'frL/[S
public static String toString(int algorithm){ p/^\(/\])
return name[algorithm-1]; FOnA;5Aa
} 2 DNzC7}e
HZQ3Ht3Vh
public static void sort(int[] data, int algorithm) { @ 6VH%
impl[algorithm-1].sort(data); x)qHeS
} \5pAG mgD
iJj?~\zp
public static interface Sort { i(cb&;Xx:A
public void sort(int[] data); V;+$/>J`vB
} `F`'b)
Vh[o[ U
public static void swap(int[] data, int i, int j) { y2hFUq
int temp = data; hq[gj?P
data = data[j]; nJ0eZBgB]
data[j] = temp; z o))x(
} QRG)~
} GWE0 UO}