[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; j<tq1?? [b
} 5 HV)[us
int i1=l; icUT<@0
int i2=mid+1; @?B6aD|jE
for(int cur=l;cur<=r;cur++){ j?(!^ _!m
if(i1==mid+1) e[Xq
data[cur]=temp[i2++]; ]Ql 0v"` F
else if(i2>r) (7$$;
data[cur]=temp[i1++]; N:+ taz-
else if(temp[i1] data[cur]=temp[i1++]; CfT/R/L
else `T!#@&+
data[cur]=temp[i2++]; ;~zNqdlH
} v:ER4
} h:qHR] 8dZ
5K56!*Y
} P-z`c\Rt
N=,j}FY
改进后的归并排序: {_ V0
z YDK $
package org.rut.util.algorithm.support; x%BF{Sw
l\q} |o
import org.rut.util.algorithm.SortUtil; u>cC O'q
%l9$a`&
/** @YL}km&Fw
* @author treeroot ~I_owCVZ
* @since 2006-2-2 BD;H
* @version 1.0 k&s; {|!
*/ 4L:>4X[T
public class ImprovedMergeSort implements SortUtil.Sort { Sgj/s~j~1
LPE)
private static final int THRESHOLD = 10; [e"RTTRfZ
L`K;IV%;
/* Up?=m^
* (non-Javadoc) 9R]](g#
* BnEdv8\,&s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o'UHStk
*/ h W.2p+
public void sort(int[] data) { LM,fwAX
int[] temp=new int[data.length]; 9&jPp4qG
mergeSort(data,temp,0,data.length-1); 6$e]i|e
} IcoowZZ
q.oLmX
private void mergeSort(int[] data, int[] temp, int l, int r) { obGWxI%a
int i, j, k; Cd~LsdKE5
int mid = (l + r) / 2; oX|?:MS:
if (l == r) <'*4j\*
return; nm):SEkC
if ((mid - l) >= THRESHOLD) :EB,{|m
mergeSort(data, temp, l, mid); \|q-+4]@,
else #<#%>Y^
insertSort(data, l, mid - l + 1); B_~jA%0m'
if ((r - mid) > THRESHOLD) jH0Bo;
mergeSort(data, temp, mid + 1, r); ,f<B}O
else ~%P3Pp
insertSort(data, mid + 1, r - mid); FzhT$7Gw
%cj58zO|y
for (i = l; i <= mid; i++) { +qE']yzm!
temp = data; qY}Cg0[@g
} S:Xs'0K_
for (j = 1; j <= r - mid; j++) { 3j&B(aLy
temp[r - j + 1] = data[j + mid]; )0|):g
} 3]S`|#J
int a = temp[l]; kIM C~Z
int b = temp[r]; Xiju"Cup"
for (i = l, j = r, k = l; k <= r; k++) { @XBH.A^7r
if (a < b) { u+DX$#-n!]
data[k] = temp[i++]; Z3`2-r_=
a = temp; Sh$U-ch@
} else { 4WG=m}X
data[k] = temp[j--]; ?#ihJt,
b = temp[j]; 5mIXyg 0:
} <ge}9pU)o^
} j0?>w{e
} ~,Mr0
lPp6 pVr
/** u*k*yWdr
* @param data #S*pD?VZ
* @param l _#(s2.h~J
* @param i cuMc*i$w!
*/ $kv[iI@
private void insertSort(int[] data, int start, int len) { /&QQ p3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nrbazyKm
} kYtHX~@
} 3.~h6r5-
} fO+UHSC
} D+hB[*7Fs
' 3VqkQ4
堆排序： .t:DvB
'2xcce#
package org.rut.util.algorithm.support; \gP. \
?"u'#f_
import org.rut.util.algorithm.SortUtil; 1W0.Ufl)
nHVPMi>
/** AtT"RG-6
* @author treeroot soxfk+ 9
* @since 2006-2-2 )1K! [W}t
* @version 1.0 &|NZ8:*+#
*/ b_ZNI0Hp@
public class HeapSort implements SortUtil.Sort{ ik1XGFy?
)5'rw<:="
/* (non-Javadoc) 6."PS4}:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lh~<s2[R2
*/ W0U`Kt&~a
public void sort(int[] data) { {sl~2#,}b1
MaxHeap h=new MaxHeap(); '#KA+?@
h.init(data); InP[yFV-z
for(int i=0;i h.remove(); "B~WcC
System.arraycopy(h.queue,1,data,0,data.length); 5'62ulwMP=
} tr5'dX4]
R~!\-6%_
private static class MaxHeap{ @OY1`EuO
QYH."7X >
void init(int[] data){ t(wZiK}
this.queue=new int[data.length+1]; 2c"/QT
for(int i=0;i queue[++size]=data; cB_pyX9Z
fixUp(size); m'3OGvd
} ,cPkx~w0
} 0c`sb+?
\ hrBq^I
private int size=0; nrI"k2oA@
sC!1B6:
private int[] queue; !,Qm
Ko4)0&
public int get() { 5d>nIKW
return queue[1]; 9)jo7,VM
} !~?W \b\:
;A x=]Q
public void remove() { #dHr&1(
SortUtil.swap(queue,1,size--); -|6V}wHg~
fixDown(1); ~Ry $>n*/
} YomwjKyuP
file://fixdown wEZ,49
private void fixDown(int k) { %uh R'8"
int j; ~K4k'
while ((j = k << 1) <= size) { &"sX^6t
if (j < size %26amp;%26amp; queue[j] j++; ,\BfmC_i
if (queue[k]>queue[j]) file://不用交换 7ytm.lU
break; @gs26jX~2}
SortUtil.swap(queue,j,k); _e;N'DZ
k = j; jQY>9+t
} yBr$ 0$
} (qNco8QKu3
private void fixUp(int k) { %j~9O~-
while (k > 1) { N5[_a/
int j = k >> 1; ] dW%g?
if (queue[j]>queue[k]) (K^YD K
break; +I^+k"
SortUtil.swap(queue,j,k); l :f9Ih
k = j; ]R97n|s_
} VC/R)%@%
} Rh!L'?C
tpN]evp|
} j:3A;r\
j4.Qvj >:4
} >:3xi{
N{?Tm`""
SortUtil： \9dz&H
cRs{=RGc
package org.rut.util.algorithm; wJ;9),fL
^G]KE8
import org.rut.util.algorithm.support.BubbleSort; QT7w::ht
import org.rut.util.algorithm.support.HeapSort; q$e T!'x
import org.rut.util.algorithm.support.ImprovedMergeSort; pkrl@jv >
import org.rut.util.algorithm.support.ImprovedQuickSort; 7AZ5%o
import org.rut.util.algorithm.support.InsertSort; 'US:Mr3
import org.rut.util.algorithm.support.MergeSort; |NphG|
import org.rut.util.algorithm.support.QuickSort; T{5M1r
import org.rut.util.algorithm.support.SelectionSort; eY0Ly7
import org.rut.util.algorithm.support.ShellSort; r< d?
h$#4ebp
/** umq$4}T'$
* @author treeroot n?TO!5RZK
* @since 2006-2-2 ?M*C*/R
* @version 1.0 RW|UQY#
*/ KDNTnA1c
public class SortUtil { +lY\r +;
public final static int INSERT = 1; g7E`;&f
public final static int BUBBLE = 2; Jgi{7J
public final static int SELECTION = 3; \?5[RR
public final static int SHELL = 4; qiwQUm{
public final static int QUICK = 5; jk WBw.(
public final static int IMPROVED_QUICK = 6; cG~_EX$
public final static int MERGE = 7; [4V|UvKz
public final static int IMPROVED_MERGE = 8; 'tq\<y
public final static int HEAP = 9; ss|6_H =
8ESkG
public static void sort(int[] data) { .{-iq(3
sort(data, IMPROVED_QUICK); ,=XS%g}l4
} juve9HaW
private static String[] name={ /_ hfjCE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iG;d0>Sp
}; _S%OX_UMn^
9v5.4a}
private static Sort[] impl=new Sort[]{ -Y!=Iw 4
new InsertSort(), 7@e[:>e
new BubbleSort(), Z;dwn~Tw
new SelectionSort(), 6i?kkULBS
new ShellSort(), NZi'eZ{^`
new QuickSort(), Ay[9k=q]
new ImprovedQuickSort(), Q>+_W2~]
new MergeSort(), xr1I8 5kM
new ImprovedMergeSort(), ;Kq<',u~
new HeapSort() lzQ&)7`
}; c+\Gd}IJq
=^".{h'-
public static String toString(int algorithm){ M\$<g
return name[algorithm-1]; H~1?MAX
} E!(`275s
+MZ2e^\F
public static void sort(int[] data, int algorithm) { M#22Zfxq
impl[algorithm-1].sort(data); U%SNROj
} z<C~DH
ES:p^/=*
public static interface Sort { 36D,el In
public void sort(int[] data); L52z
} _ jM6ej<
jak|LOp
public static void swap(int[] data, int i, int j) { qgY(S}V
int temp = data; T=)L5Vuq<
data = data[j]; 9DocId.
data[j] = temp; BRQ5
} nh_xbo5L[
} F\$}8,9