[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; &LYU#$sj
} >eJk)qM
int i1=l; ot,<iE#za
int i2=mid+1; JO1c9NyKr
for(int cur=l;cur<=r;cur++){ v?Y9z!M
if(i1==mid+1) Zx`hutCv
data[cur]=temp[i2++]; 30F&FTW
else if(i2>r) oYqlN6n,=6
data[cur]=temp[i1++]; )7J@A%u
else if(temp[i1] data[cur]=temp[i1++]; 9~u1fk{
else ?b2%\p`"
data[cur]=temp[i2++]; "4L' 2w+
} }{9E~"_[
} =u73AM}
rEZa%)XJ
} +B*ygv:
Oja)J-QXb
改进后的归并排序: RQ|!?\a=
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package org.rut.util.algorithm.support; I_eYTy-a`1
#nn2odR
import org.rut.util.algorithm.SortUtil; kGX`y.-[
Q0nSOTQ
/** rXfQ_
* @author treeroot HtS:'~DYo
* @since 2006-2-2 ks'25tv}F
* @version 1.0 :9K5zD
*/ 9j9A'Y9(
public class ImprovedMergeSort implements SortUtil.Sort { >#c]rk:
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private static final int THRESHOLD = 10; k(hes3JV
GQ)hZt0
/* DA[-( s
* (non-Javadoc) ?u 9) GJO[
* g4%x7#vz0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RQ9T<t42
*/ y]M/oH
public void sort(int[] data) { 'J]V"Z)
int[] temp=new int[data.length]; `^(6{p ?
mergeSort(data,temp,0,data.length-1); j}S
} v@"xEf1n[
_<kE32Bb
private void mergeSort(int[] data, int[] temp, int l, int r) { Wc03Sv&FZ
int i, j, k; s`GSc)AI
int mid = (l + r) / 2; n5oB#>tI0
if (l == r) $ShL^g@
return; `h :&H,N
if ((mid - l) >= THRESHOLD) Vx-HW;,
mergeSort(data, temp, l, mid); .|KxQn}
else CI$F#j
insertSort(data, l, mid - l + 1); nN/v7^^
if ((r - mid) > THRESHOLD) |~rDEv3
mergeSort(data, temp, mid + 1, r); >0:h(,?V
else \L6U}ZQ2V
insertSort(data, mid + 1, r - mid); @T]gwJ
o<@2zhuhrx
for (i = l; i <= mid; i++) { >x&$lT{OY
temp = data; #j iQa"
} S #&HB
for (j = 1; j <= r - mid; j++) { duV|'ntr
temp[r - j + 1] = data[j + mid]; 9?bfZF4A=
} ;Z C18@
int a = temp[l]; Yca9G?^\v
int b = temp[r]; $*8c0.{U
for (i = l, j = r, k = l; k <= r; k++) { W[j =!o
if (a < b) { 8p>%}LX/
data[k] = temp[i++]; -:cS}I
a = temp; <w.V!"!
} else { M+)%gnq`u
data[k] = temp[j--]; 4 lJ@qhV
b = temp[j]; noh3mi
} }+i ZY\t
} w&`gx6?-na
} m{(D*Vuqd
1S0Hc5vw
/** I?s)^'
* @param data qV9`
* @param l _Vj O [hx
* @param i 1Qhx$If~
*/ REnRpp$
private void insertSort(int[] data, int start, int len) { g4RkkoZ>)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pk: ruf`)
} HBo^8wN
} H:d{Sru
} i+Ob1B@w
} vlp]!7v
#x)G2T'?
堆排序： H<X4R
Rj+}L ~"
package org.rut.util.algorithm.support; ( F0.lDZ
8T$:^HW
import org.rut.util.algorithm.SortUtil; [M@i,d-;A
:4]&R9J>o
/** X[h=UlF
* @author treeroot V1xpJ
* @since 2006-2-2 "&Q-'L!M'/
* @version 1.0 Drk9F"J
*/ Qn[4&nUD
public class HeapSort implements SortUtil.Sort{ jWUN~#p!
f ,K1a9.
/* (non-Javadoc) R:0Fv9bwS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _+z@Qn?#6h
*/ Rk2ZdNc\
public void sort(int[] data) { XMa(XOnX
MaxHeap h=new MaxHeap(); }I#;~|v~<
h.init(data); r_FW)Fu^
for(int i=0;i h.remove(); wb"Jj
System.arraycopy(h.queue,1,data,0,data.length); &zb_8y,
} T7Lk4cU
\P&'4y~PL
private static class MaxHeap{ b0m1O.&I_
',*I=JW;
void init(int[] data){ o Ep\po1
this.queue=new int[data.length+1]; czdNqk.kh
for(int i=0;i queue[++size]=data; J@(*(oQb
fixUp(size); Vnv<]D zC
} e9k}n\t3
} 0(@8
v|t^th,
private int size=0; u2-%~Rlo
S%mN6b~{
private int[] queue; TcO@q ]+S
&q``CCOF&
public int get() { `"A\8)6-
return queue[1]; :*A6Ba
} I&Yu=v/_
&R\ .^3
public void remove() { c6E@+xU
SortUtil.swap(queue,1,size--); d[-w&[iy
fixDown(1); ?Xh=rx_
} S7E:&E&
file://fixdown tA}O'x
private void fixDown(int k) { SZK~<@q5
int j; }"Hf/{E$_"
while ((j = k << 1) <= size) { A;Xn#t ,(K
if (j < size %26amp;%26amp; queue[j] j++; `Qaw]&O
if (queue[k]>queue[j]) file://不用交换 m)= -sD
break; wKXKc\r
SortUtil.swap(queue,j,k); RUYwDtC
k = j; =NH:/j^
} i/-Xpj]Zf
} ]{.rx),
private void fixUp(int k) { JV(|7Sk
while (k > 1) { I$9t^82j
int j = k >> 1; Y.[^3
if (queue[j]>queue[k]) %]r@vjeyd
break; (NScG[$}
SortUtil.swap(queue,j,k); 1;]cYIq
k = j; e@NS=U` <
} -P(q<T2MV'
} T&w3IKb|}
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} K$R1x1lc2
|9~{&<^X
} W*}q;ub;
!@W1d|{lu
SortUtil： TL1pv l
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package org.rut.util.algorithm; xzz[!yJjG
%_KNAuM
import org.rut.util.algorithm.support.BubbleSort; ]Tx8ImD#)A
import org.rut.util.algorithm.support.HeapSort; ncu &<j}U
import org.rut.util.algorithm.support.ImprovedMergeSort; hg]\~#&-
import org.rut.util.algorithm.support.ImprovedQuickSort; H}dsd=yO
import org.rut.util.algorithm.support.InsertSort; ~{=+dQ
import org.rut.util.algorithm.support.MergeSort; 6^if%62l&
import org.rut.util.algorithm.support.QuickSort; 5d*k[fZ
import org.rut.util.algorithm.support.SelectionSort; $s)G0/~W
import org.rut.util.algorithm.support.ShellSort; iVFHr<zk
#J\ 2/~
/** bJx{mq
* @author treeroot 6}K|eUak/
* @since 2006-2-2 g(;t,Vy,I
* @version 1.0 BN|+2D+S
*/ c03A_2%
public class SortUtil { "m3u}!`3
public final static int INSERT = 1; !D7/Ja
public final static int BUBBLE = 2; M9fAv
public final static int SELECTION = 3; zq8z#FN
public final static int SHELL = 4; `N_NzH
public final static int QUICK = 5; 1WfN_JKB5
public final static int IMPROVED_QUICK = 6; 1YTnOiYS1
public final static int MERGE = 7; q\x*@KQgM
public final static int IMPROVED_MERGE = 8; xD8x1-
public final static int HEAP = 9; CD +,&id
-9UQs.Nv
public static void sort(int[] data) { G!ty@ Fx
sort(data, IMPROVED_QUICK); Om\?<aul
} eg3zpgZ
private static String[] name={ L@_IGH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ullq}}
}; }e9E+2}Z\
#W @6@Mv
private static Sort[] impl=new Sort[]{ B;SYO>.W
new InsertSort(), 2w$o;zz1
new BubbleSort(), LrX7WI
new SelectionSort(), 6w0/;8(_m
new ShellSort(), `$JPF Z
new QuickSort(), KA0Ui,q3
new ImprovedQuickSort(), 9F(<n
new MergeSort(), RQ X
new ImprovedMergeSort(), #VgPg5k.<
new HeapSort() ' &^:@V
}; N32!*TsWs
ssoIC
public static String toString(int algorithm){ w6F4o;<PR
return name[algorithm-1]; j="{^b
} 0V uG(O
21O!CvX
public static void sort(int[] data, int algorithm) { !_QE|tVeR
impl[algorithm-1].sort(data); Ko]A}v\]
} EEEYNu/4/
2ro4{^(_
public static interface Sort { v/ dSz/<]
public void sort(int[] data); [[}KCND
} -fI-d1@
*)gbKXb
public static void swap(int[] data, int i, int j) { B<SuNbR
int temp = data; _Y4%Fv>@
data = data[j]; t7pe)i,)
data[j] = temp; h.gj4/g
} OGw =e{
} ne4j_!V{Mf