[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; + 33@?fl.
} %Gj8F4{
int i1=l; '|*?*6q
int i2=mid+1; Yd=a}T
for(int cur=l;cur<=r;cur++){ 9^Whg~{
if(i1==mid+1) >teOm?@U
data[cur]=temp[i2++]; \ZhfgE8{%
else if(i2>r) ~r$jza~o(
data[cur]=temp[i1++]; ]Xf% ,iu
else if(temp[i1] data[cur]=temp[i1++]; @`Eg(
else XC "'Q+
data[cur]=temp[i2++]; .YnFH$;$
} _~tEw.fM5
} 0=q;@OIf
f=!VsR2o
} {g~bQ2wDC
uN^=<B?B
改进后的归并排序: Sh,&{z!
'd&0Js$^
package org.rut.util.algorithm.support; \nB8WSvk2W
4jBC9b}O
import org.rut.util.algorithm.SortUtil; <~!Hx+j
eKz?"g/j
/** Ck@J,~x1D
* @author treeroot HJ[/|NZU$
* @since 2006-2-2 Cc<,z*T
* @version 1.0 f1)x5N
*/ "+ >SJ~
public class ImprovedMergeSort implements SortUtil.Sort { qYf |Gv
g'u?Rn7*J
private static final int THRESHOLD = 10; PN<C=gAe
RZ7(J
/* 7kK #\dI
* (non-Javadoc) #gaQaUjR
* P"?FnTbv[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3 M10fI?
*/ #E+gXan
public void sort(int[] data) { 2gjGeM
int[] temp=new int[data.length]; ^o@,3__7Q
mergeSort(data,temp,0,data.length-1); W$o27f
} 9cx =@
m6yIR6H
private void mergeSort(int[] data, int[] temp, int l, int r) { ',4x$qe
int i, j, k; |Uk" {
int mid = (l + r) / 2; 6PF8 /@Nh
if (l == r) 9F- )r'
return; y}K\%;`[a
if ((mid - l) >= THRESHOLD) /?6|&
mergeSort(data, temp, l, mid); \WrFqm#
else 0\~Z5k`IT
insertSort(data, l, mid - l + 1); J.+BD\pa
if ((r - mid) > THRESHOLD) 4E[!,zvl
mergeSort(data, temp, mid + 1, r); $RwB_F
else q7m6&2$[
insertSort(data, mid + 1, r - mid); $BDBN_p
vNOH&ja-s
for (i = l; i <= mid; i++) { 0Hw-59MK
temp = data; #Hh^3N
} W*:,m8wk
for (j = 1; j <= r - mid; j++) { 's!-80sd
temp[r - j + 1] = data[j + mid]; \#x}q'BC4
} @l(vYJ:f
int a = temp[l]; `C+HE$B
int b = temp[r]; O0*e)i8
for (i = l, j = r, k = l; k <= r; k++) { Hv<'dt$|
if (a < b) { `}no9$l~
data[k] = temp[i++]; Hj1 EGCA
a = temp; 7ji=E";.w
} else { _0 snAt^iC
data[k] = temp[j--]; >(tn"2
b = temp[j]; B)h>8 {
} X0+fsf<H}
} 7W9d6i)
} 0i8hI6d
oXt,e
/** >Dg#9
* @param data =`C4qC_
* @param l DV]7.Bm
* @param i l??;3kh1
*/ UU}7U]9u
private void insertSort(int[] data, int start, int len) { .`Zf}[5[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <;t)6:N\
} I#FF*@oeM
} ftavbNR`W
} n1:v HBM@\
} -,":5V26
i"^<CR@e
堆排序： ;;gK@?hJ
c| ' w
package org.rut.util.algorithm.support; }GnwY97
:H[\;Z1_
import org.rut.util.algorithm.SortUtil; f.pkQe(
`Xcirfp
/** QI!i
* @author treeroot #S+Z$DQD
* @since 2006-2-2 L8vOBI7N
* @version 1.0 m^\TUj
*/ 4`2$_T$F
public class HeapSort implements SortUtil.Sort{ 4DO/rtkVq
K,}w]b
/* (non-Javadoc) [H"#7t.V-~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EZ(^~k=I
*/ }Ewo_P&`
public void sort(int[] data) { L$Z(+6m5
MaxHeap h=new MaxHeap(); qMS}t3X
h.init(data); 2+92Q_+
for(int i=0;i h.remove(); jlKGXD)Q[
System.arraycopy(h.queue,1,data,0,data.length); /k"hH\Pp
} 26:evid
JFqf;3R
private static class MaxHeap{ L,-u.vV
.)8
void init(int[] data){ Q)Dwq?
this.queue=new int[data.length+1]; f@:CyB GQ
for(int i=0;i queue[++size]=data; iIU( C.I
fixUp(size); %N~CvN@T
} |r~ uos
} O5 7jz= r
j=.g:&r)
private int size=0; !J.rM5K
Y%vP#>h
private int[] queue; WhUa^
.9\Cy4_qSd
public int get() { ;x>;jS.t
return queue[1]; X"J%R/f
} >7FSH"8[,
[n<.fw8$b
public void remove() { t61'LCEis
SortUtil.swap(queue,1,size--); iH _"W+dq
fixDown(1); By/bVZks
} $wXih#7
file://fixdown QBjY&(vY
private void fixDown(int k) { chwh0J;
int j; &kq7gCd
while ((j = k << 1) <= size) { uf0^E3H
if (j < size %26amp;%26amp; queue[j] j++; .5k^f5a
if (queue[k]>queue[j]) file://不用交换 ]EX--d<_`
break; '?L%F{g/9
SortUtil.swap(queue,j,k); >\-3P$
k = j; }Ch[|D=Wd6
} 3&'R1~Vh
} Cs;<'[_?YO
private void fixUp(int k) { gx&73f<J
while (k > 1) { #y`k$20"
int j = k >> 1; e6es0D[>5
if (queue[j]>queue[k]) - coy@S=.'
break; e>(Wvb&4
SortUtil.swap(queue,j,k); p d%LL?O
k = j; v7$9QVze
} wO\!xW:
} W)
*%f3rvt7@)
} H.;yLL=
c( 8W8R
} k%a?SU<f
x_pMG!2
SortUtil： jM[f[
qSCTFJ0
package org.rut.util.algorithm; K/A ? ]y
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import org.rut.util.algorithm.support.BubbleSort; zrTY1Asw;4
import org.rut.util.algorithm.support.HeapSort; n K0hTQ
import org.rut.util.algorithm.support.ImprovedMergeSort; X!?wL0n
import org.rut.util.algorithm.support.ImprovedQuickSort; HO G=c!b
import org.rut.util.algorithm.support.InsertSort; kOzt"t&
import org.rut.util.algorithm.support.MergeSort; :'b%5/ ^q
import org.rut.util.algorithm.support.QuickSort; +"G(
import org.rut.util.algorithm.support.SelectionSort; /T4VJ{D
import org.rut.util.algorithm.support.ShellSort; }W)Mwu'W
_/8y1)I
/** .k|-Ks|d|
* @author treeroot ^K*~ <O-
* @since 2006-2-2 j!"iYtgV
* @version 1.0 \j/}rzo]
*/ )uuwwz
public class SortUtil { 7j{Te)"
public final static int INSERT = 1; K-ju,4A
public final static int BUBBLE = 2; ,$SkaTBe
public final static int SELECTION = 3; "Vq@bNtu+
public final static int SHELL = 4; fLc!Sn.Y
public final static int QUICK = 5; %!#rrt,F
public final static int IMPROVED_QUICK = 6; u<J2p?`\&`
public final static int MERGE = 7; AIf[W">\
public final static int IMPROVED_MERGE = 8; ]r]+yM|
public final static int HEAP = 9; Ed8U;U b
{m>~`
public static void sort(int[] data) { v^57j:sD
sort(data, IMPROVED_QUICK); KX$qM g1j
} 1@s^$fvW
private static String[] name={ 6qY\7R2+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z;``g"dSw
}; T;xHIg4
Bl:{p>-q
private static Sort[] impl=new Sort[]{ LJ:mJ#
new InsertSort(), nA|gQibA
new BubbleSort(), -DbH6u3
new SelectionSort(), V_7Y1GD
new ShellSort(), vEX|Q\b6'
new QuickSort(), uVoF<={
new ImprovedQuickSort(), )<m=YI ;<
new MergeSort(), {-:4O\/
new ImprovedMergeSort(), w50.gr7
new HeapSort() & bp#1KR)
}; `bBfNI?3d*
`ja`#%^\u
public static String toString(int algorithm){ 5&GQ=m
return name[algorithm-1]; KY;uO 8Te
} m? ]zomP
.rD#1)O
public static void sort(int[] data, int algorithm) { EN5G:hD
impl[algorithm-1].sort(data); %N?W]vbra
} P'FPe55F
jpPdjQ
public static interface Sort { 3N)Ycf8
public void sort(int[] data); o`JlXuG?o
} 24.7S LXO
<s59OdzP
public static void swap(int[] data, int i, int j) { bahc{ZC2
int temp = data; =0jmm(:Jh
data = data[j]; $\JQGic`
data[j] = temp; A>ug'.
} XSL t;zL:
} +S:u[x