[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; ~ED8]*H|`
} ;|_aACina
int i1=l; 3aIP^I1
int i2=mid+1; Y"~Tf{8
for(int cur=l;cur<=r;cur++){ j9"uxw@
if(i1==mid+1) e0iE6:i
data[cur]=temp[i2++]; ( HCB\!g
else if(i2>r) R~OameRR
data[cur]=temp[i1++]; q SR\=:$
else if(temp[i1] data[cur]=temp[i1++]; -4ityS @
else ^uB9EP*P
data[cur]=temp[i2++]; ?m.WqNBH7
} S9/oBxGN
} 8xs}neDg*
_GEt:=DAP#
} I3 /^{-n
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改进后的归并排序: JGQlx-qv
Yd]y`J?#
package org.rut.util.algorithm.support; NAd|n+[d
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import org.rut.util.algorithm.SortUtil; b[&A,ZPh$@
'&/ 35d9|*
/** qxS=8#-`(
* @author treeroot O[ tD7!1
* @since 2006-2-2 htC~BK3(
* @version 1.0 ^Ud1 ag!-
*/ \a\-hm
public class ImprovedMergeSort implements SortUtil.Sort { U9k;)fK
"f^s*I
private static final int THRESHOLD = 10; -*xm<R],
g}>Sc=e<
/* {No*Z'X
* (non-Javadoc) x'IVP[xh`A
* 8m%+O#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )I7~<$w
*/ 4C@ .X[r
public void sort(int[] data) { 3ZdheenK9
int[] temp=new int[data.length]; _dOR-<
mergeSort(data,temp,0,data.length-1); fik*-$V`
} GIXxOea1
05= $Dnv
private void mergeSort(int[] data, int[] temp, int l, int r) { /{Ff)<Q.Z
int i, j, k; I5EKS0MQ!
int mid = (l + r) / 2; j{k]8sI,H]
if (l == r) ( R2432R}J
return; UjCQ W:[
if ((mid - l) >= THRESHOLD) 6)<g%bH!
mergeSort(data, temp, l, mid); (-k`|X"
else oU/CXz?H
insertSort(data, l, mid - l + 1); tQ!p<Q= $)
if ((r - mid) > THRESHOLD) ee7#PE]}
mergeSort(data, temp, mid + 1, r); OZ{YQ}t{^1
else S$9>9!1>*
insertSort(data, mid + 1, r - mid); SN w3xO!;&
BET3tiHV
for (i = l; i <= mid; i++) { <}e2\x
temp = data; /S4$qr cM
} j1/.3\
for (j = 1; j <= r - mid; j++) { u,h,;'J
temp[r - j + 1] = data[j + mid]; Ns?qLSN
} Xvy3D@o
int a = temp[l]; mOiA}BGw
int b = temp[r]; 'Xj9sAB
for (i = l, j = r, k = l; k <= r; k++) { WhPwD6l>
if (a < b) { jUny&Alj
data[k] = temp[i++]; &T7|f!y
a = temp; =Xwr*FTr
} else { DH7B4P
data[k] = temp[j--]; P-B3<~*i!
b = temp[j]; 6T3uv,2
} fL3Px
} y3!r;>2k=
} Fk&W*<}/;
5Q_T=TL
/** QGv$~A[h
* @param data j?!BHNs
* @param l ~Sq!P
* @param i :{#%_^}k
*/ \}CQo0v
private void insertSort(int[] data, int start, int len) { #jY\l&E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9 Vn
} ZUDdLJ
} +rT%C&ze
} &yu3nA:7D
} c eH8
UNx|+
堆排序： .I~#o$6
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package org.rut.util.algorithm.support; U[l7n3Y=
PwF 1Pr`r
import org.rut.util.algorithm.SortUtil; lrn3yDkR?
CcF$?07 i
/** uJBs3X
* @author treeroot ;rBd_
* @since 2006-2-2 U`{'-L.
* @version 1.0 "Jd!TLt\x
*/ P'EPP*)q
public class HeapSort implements SortUtil.Sort{ n^} -k'l
fY)Dx c&ue
/* (non-Javadoc) <n8K"(sy}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +sN'Y/-
*/ aT9+] Ig
public void sort(int[] data) { qN5 ru2
MaxHeap h=new MaxHeap(); gmCW__oR
h.init(data); zDEX `~c
for(int i=0;i h.remove(); oJ r&9.S
System.arraycopy(h.queue,1,data,0,data.length); 0?DD!H)&w
} 5AX AIPn)
{2|[7oNT6
private static class MaxHeap{ z]/;?
G~$.Af!9W
void init(int[] data){ ejr9e@D^
this.queue=new int[data.length+1]; CV9o,rL
for(int i=0;i queue[++size]=data; D'{NEk@
fixUp(size); 18(hrj
} s^atBqw,
} (P(=6-0
E5^P*6c(
private int size=0; rV yw1D
uL\b*rI
private int[] queue; jkTh)Bm|'
P}YtT3.K
public int get() { *u?QO4>
return queue[1]; S5Hb9m&&
} }rWEa^
=H<I` J'
public void remove() { *=sMJY9#jE
SortUtil.swap(queue,1,size--); x,U'!F
fixDown(1); 0_!')+
} 4trP*u,4
file://fixdown Ry$zF~[
private void fixDown(int k) { we4k VAn
int j; !ucHLo3:
while ((j = k << 1) <= size) { `"7}'|
if (j < size %26amp;%26amp; queue[j] j++; LB(I^
if (queue[k]>queue[j]) file://不用交换 \&{a/e2:S
break; M2pe*z
SortUtil.swap(queue,j,k); >9WJa5{
k = j; UN FQ`L
} UR3qzPm!0e
} _T96.~Q
private void fixUp(int k) { 1Q5:Vo^B#
while (k > 1) { d4#CZv[g/
int j = k >> 1; :\!D 6\o6
if (queue[j]>queue[k]) S.<aCN<@
break; a#huK~$~
SortUtil.swap(queue,j,k); >yZe1CP
k = j; aUy!(Y
} @3^D[
} ?%|w?Fdx-
65%WjO
} wjq;9%eXk
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} KF4D)NM|
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SortUtil： S'%|40U
-qbx:Kk(
package org.rut.util.algorithm; [NxC7p:Lo
BR*'SF\T
import org.rut.util.algorithm.support.BubbleSort; Oc6_x46S4
import org.rut.util.algorithm.support.HeapSort; YaBZ#$r
import org.rut.util.algorithm.support.ImprovedMergeSort; EJCf[#Sf
import org.rut.util.algorithm.support.ImprovedQuickSort; Kl'u
import org.rut.util.algorithm.support.InsertSort; 65HP9`5Tm
import org.rut.util.algorithm.support.MergeSort; tj'xjX
import org.rut.util.algorithm.support.QuickSort; VRb+-T7"
import org.rut.util.algorithm.support.SelectionSort; J1s~w`,
import org.rut.util.algorithm.support.ShellSort; ^vj}
s~z~9#G(6
/** }&*wJ]j`L
* @author treeroot *(,zPn,
* @since 2006-2-2 { R`"Nk
* @version 1.0 'bd|Oww1u
*/ s|`ZV^R
public class SortUtil { hfJeVT-/v
public final static int INSERT = 1; +HXR ))X
public final static int BUBBLE = 2; 8opd0'SNaB
public final static int SELECTION = 3; rWP -Rm
public final static int SHELL = 4; 18HmS>Qo
public final static int QUICK = 5; QX`T-)T e
public final static int IMPROVED_QUICK = 6; O)aWTI
public final static int MERGE = 7; rA\6y6dFs
public final static int IMPROVED_MERGE = 8; Z!& u_
public final static int HEAP = 9; {^T_m)|n
j;MQ_?"iN
public static void sort(int[] data) { L0Ycf|[s,
sort(data, IMPROVED_QUICK); +W%3VV$
} %w3Y!7+
private static String[] name={ >p`ZcFNs"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vG{lxPIj
}; d:L|BkQ7*
6CV9ewr
private static Sort[] impl=new Sort[]{ R<)^--n
new InsertSort(), 7'g{:dzS*3
new BubbleSort(), =pCO1<wR
new SelectionSort(), Wik8V0(
new ShellSort(), lz [s
new QuickSort(), @2`$ XWD
new ImprovedQuickSort(), !U"?vSl
new MergeSort(), <k'%rz
new ImprovedMergeSort(), uxOeD%Z>
new HeapSort() [0?W>A*h
}; n/6qc3\5i
|>~pA}
public static String toString(int algorithm){ }0oVIr
return name[algorithm-1]; tW -f_0a.
} 9 WO|g[Y3
ls@j8bVv^
public static void sort(int[] data, int algorithm) { PB(q9gf"1}
impl[algorithm-1].sort(data); BY5ODc$
} {8pN]=SaJ~
k0v&U@+-J
public static interface Sort { fe4Ki
public void sort(int[] data); TF%MO\!
} ;{Nc9d
|[W7&@hF
public static void swap(int[] data, int i, int j) { ccY! OSae
int temp = data; :Ldx^UO
data = data[j]; vveL|j
data[j] = temp; nJhaI
} c9:8KMF)
} ~QngCg-5q