[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; vG<Mz?wr
} Dt8eVWkN~
int i1=l; .3$iOMCH
int i2=mid+1; N#|c2n+
for(int cur=l;cur<=r;cur++){ /bg8oB4
if(i1==mid+1) ZWYwVAo
data[cur]=temp[i2++]; Ey)ox$
else if(i2>r) !m78/[LW
data[cur]=temp[i1++]; k~Gjfo
else if(temp[i1] data[cur]=temp[i1++]; NmK%k jCx
else 28zt.9
data[cur]=temp[i2++]; d d8^V_Kx
} !5x"d7
} F YcC2TM
CKj3-rcF(
} |`#[jHd
Ie``Wb=
改进后的归并排序: (Iu5QLE
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package org.rut.util.algorithm.support; 'tF<7\!
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import org.rut.util.algorithm.SortUtil; 8iq~ha$]|
jt?R a1Z
/** z^~fVl
* @author treeroot =n%?oLg^
* @since 2006-2-2 ^]OD+v
* @version 1.0 ]kc]YO7i%R
*/ P%.9g
public class ImprovedMergeSort implements SortUtil.Sort { V5R``Tp
\\)3:1X
private static final int THRESHOLD = 10; 6VRVk7"
2N`Vx3
/* aNfgSo05@n
* (non-Javadoc) 8> Gp #T
* uPb9j;Q?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RtK/bUa
*/ VM|8HR7U
public void sort(int[] data) { rY88xh^
int[] temp=new int[data.length]; U.d*E/OR5
mergeSort(data,temp,0,data.length-1); fFMG9]*
} O`H[,+vm[
wMei`svY
private void mergeSort(int[] data, int[] temp, int l, int r) { yU&A[DZQ
int i, j, k; 90M:0SH
int mid = (l + r) / 2; ]oZ$,2#;~
if (l == r) h|_G2p^J+"
return; M`AbH19
if ((mid - l) >= THRESHOLD) 4{*K%pv\
mergeSort(data, temp, l, mid); ;z!~-ByzL
else 2x'JR yef
insertSort(data, l, mid - l + 1); to+jQ9q8
if ((r - mid) > THRESHOLD) 0G;RMR':5
mergeSort(data, temp, mid + 1, r); ai#0ZgO
else [96|xe\s
insertSort(data, mid + 1, r - mid); 7?b'"X"
Kq{9:G
for (i = l; i <= mid; i++) { 4TUe*F@ ML
temp = data; Ci=c"JdB
} /\h&t6B1
for (j = 1; j <= r - mid; j++) { DS-Kot(k(z
temp[r - j + 1] = data[j + mid]; <"aPoGda
} e$ E=n
int a = temp[l]; 6SW:'u|90
int b = temp[r]; SbrBlP:G
for (i = l, j = r, k = l; k <= r; k++) { liPUK#
if (a < b) { ^hTq~"
data[k] = temp[i++]; YgrBIul
a = temp; '^}l|(
} else { mbSJ}3c"
data[k] = temp[j--]; J1&G1\G|s=
b = temp[j]; GiI2nHZc
} c7'I'~
} q48V|6X'q
} 6d`6=D:
7_n@iUG2n
/** M {_`X
* @param data KYd2=P6
* @param l @I#@%"AW
* @param i bZ:w_z[3=
*/ |Ax~zk;
private void insertSort(int[] data, int start, int len) { 3>/Yku)t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h5.u W8
} 8BC}D+q
} pOpie5)7X
} v6TH-
} -0Y8/6](
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堆排序： ]hN%~ ~$>
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package org.rut.util.algorithm.support; {}{|trr-E
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import org.rut.util.algorithm.SortUtil; / IAK'/
{ ~FYiX
/** gey`HhZp)
* @author treeroot s3Y \,9\
* @since 2006-2-2 |'b=xeH.^<
* @version 1.0 jW"C: {Ol;
*/ NA!;#!
public class HeapSort implements SortUtil.Sort{ B7_:,R.l
)$i7b
/* (non-Javadoc) VO/" ot
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pX*Oc6.0mu
*/ ?UQE;0 B
public void sort(int[] data) { ,d@.@a] `
MaxHeap h=new MaxHeap(); VctAQ|h^
h.init(data); DpoRR`
for(int i=0;i h.remove(); b:WlB[5
System.arraycopy(h.queue,1,data,0,data.length); J'.U+XU
} S_ e }>-
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private static class MaxHeap{ sq\oatMw[
j^ex5A.& &
void init(int[] data){ #p6#,PZ
this.queue=new int[data.length+1]; 5<Xq7|Jt
for(int i=0;i queue[++size]=data; y!)Z ^u
fixUp(size); tAPqbi$a
} 0r.*7aXu
} 7.hn@_
39BGwKXb
private int size=0; khyn4
w<tr<Pu'
private int[] queue; pEw &i
RiIJ#:6+^I
public int get() { Ck/4hZ
return queue[1]; Ti=~ycwi
} NUX0=(k
oost}%WxN
public void remove() { Sz.jv#Y
SortUtil.swap(queue,1,size--); =pF 6
fixDown(1); #,0%g1
} .UU BAyjm
file://fixdown oZA?}#DRl
private void fixDown(int k) { '/Hx0]V
int j; ix=HLF-0zC
while ((j = k << 1) <= size) { gV91=Pj
if (j < size %26amp;%26amp; queue[j] j++; C;y3?+6P$
if (queue[k]>queue[j]) file://不用交换 O)kC[e4
break; ~Q0gSazXFt
SortUtil.swap(queue,j,k); n[[rI0]g
k = j; d@8=%x:
} w<|^i*
} pBG(%3PpW
private void fixUp(int k) { eZ(<hE>
while (k > 1) { x%jJvwb^|
int j = k >> 1; `u3to{
if (queue[j]>queue[k]) $,bLK|<hi
break; 6OkN(tL&.
SortUtil.swap(queue,j,k); pkWzaf
k = j; I;S[Ft8d
} $RuJm\f
} %}MZWf{
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} .>Gq/[c0|
AhZ8B'Ee
} s"*zyLUUo
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SortUtil： >t<FG2
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package org.rut.util.algorithm; IX7<
P%]li`56-c
import org.rut.util.algorithm.support.BubbleSort; !NUsfd
import org.rut.util.algorithm.support.HeapSort; Em N0K'x
import org.rut.util.algorithm.support.ImprovedMergeSort; wyzj[PDS
import org.rut.util.algorithm.support.ImprovedQuickSort; ):
import org.rut.util.algorithm.support.InsertSort; yS_,lS
import org.rut.util.algorithm.support.MergeSort; ==F[5]?
import org.rut.util.algorithm.support.QuickSort; :[3{-.c
import org.rut.util.algorithm.support.SelectionSort; \Azl6`Em
import org.rut.util.algorithm.support.ShellSort; 2$. ubA
yQ?N*'}$
/** c^S^"M|
* @author treeroot X3NHQMI
* @since 2006-2-2 dq%7A=-
* @version 1.0 RY2`v pv
*/ $?YRy_SI
public class SortUtil { >wS52ng
public final static int INSERT = 1; 8l-+ 4~mH
public final static int BUBBLE = 2; "45O!AjP
public final static int SELECTION = 3; QKDY:1]
public final static int SHELL = 4; R?a)2jl
public final static int QUICK = 5; JEL=,0J
public final static int IMPROVED_QUICK = 6; GJ edW
public final static int MERGE = 7; ;Oh4W<hH}
public final static int IMPROVED_MERGE = 8; <i``#"/
public final static int HEAP = 9; m=b~Wf39
lG;RfDI-
public static void sort(int[] data) { *G7$wW:?
sort(data, IMPROVED_QUICK); D *RF._
} qcEiJ}-
private static String[] name={ Y0:y72mK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8`XT`H
}; *|h-iA+9
zA=gDuy3@
private static Sort[] impl=new Sort[]{ .|}ogTEf
new InsertSort(), PdcF
new BubbleSort(), p&ytUTna
new SelectionSort(), 8'Sw?FbVA/
new ShellSort(), .%j&#(!
new QuickSort(), D_ybgX?0:
new ImprovedQuickSort(), Y O;N9wu3f
new MergeSort(), Sd'!(M^k3
new ImprovedMergeSort(), dtw1Am#Ci
new HeapSort() ; {$9Sc $
}; SUsD)!u_H
s,XKl5'+8e
public static String toString(int algorithm){ pV]m6!y&
return name[algorithm-1]; fEf",{I
} s7e)Mt
p8o ~
public static void sort(int[] data, int algorithm) { jU |0!]
impl[algorithm-1].sort(data); Y4e64`V)
} h?5$-#q~
s.&ewf\
public static interface Sort { C8>zr6)1
public void sort(int[] data); M/C7<?&
} gq~>S1
Sr Z\]
public static void swap(int[] data, int i, int j) { Vb*q^ v
int temp = data; c-.t8X,5(~
data = data[j]; rK)aR
data[j] = temp; 2j&-3W$^
} e@"1W
} 6Ko[[?Lf[