[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; @Hj5ZJ 3
} 1+RG@Cp
int i1=l; LY[XPV]t
int i2=mid+1; 7.$0LN/a!Z
for(int cur=l;cur<=r;cur++){ pw*<tXH!
if(i1==mid+1) V} Y %9V
data[cur]=temp[i2++]; 7y:%^sl
else if(i2>r) [f}YXQ0N)
data[cur]=temp[i1++]; mOr>*uR
else if(temp[i1] data[cur]=temp[i1++]; Cfu]umZLn
else tgH@|Kg
data[cur]=temp[i2++]; y^tuybpZY<
} Qx|m{1~-
} <Yu}7klJE
twU^ewO&
} ";yCo0*
Io*`hA]
改进后的归并排序: 4bqi&h3
Juj"cjob
package org.rut.util.algorithm.support; -l<b|`s=w.
a:Jsi=
import org.rut.util.algorithm.SortUtil; oCdWf63D
b;#3X)
/** wl #Bv,xf
* @author treeroot 5G cdz
* @since 2006-2-2 e5_a.c
* @version 1.0 U7O~ch[,
*/ Bs(\e^}
public class ImprovedMergeSort implements SortUtil.Sort { $5ZBNGr
6U6,Wu
private static final int THRESHOLD = 10; YU.aZdA&V3
s~$ZTzV
/* f/RzE
* (non-Javadoc) 5mUHk]W
* f4)fa yAVp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1X2MhV
*/ !`L%wS
public void sort(int[] data) { 0Lmq?D
int[] temp=new int[data.length]; 9F)+p7VJq
mergeSort(data,temp,0,data.length-1); n#XiCo_\
} "hi?/B#d
@9g$+_"ZT
private void mergeSort(int[] data, int[] temp, int l, int r) { 2{Nv&ZX?
int i, j, k; %1ZJi}~
int mid = (l + r) / 2; yEyx.Mh.Af
if (l == r) 4;'o`K~*
return; Aq%TZ_m
if ((mid - l) >= THRESHOLD) __M(dN(^
mergeSort(data, temp, l, mid); %!I7tR#;
else P2pdXNV
insertSort(data, l, mid - l + 1); e/JbRbZX
if ((r - mid) > THRESHOLD) .6aC2A]es
mergeSort(data, temp, mid + 1, r); n@ lf+
else {J;[ Hf5
insertSort(data, mid + 1, r - mid); x9q?^\x
V/"UDof
for (i = l; i <= mid; i++) { ^.)oQo SE
temp = data; F8mS5oB|^
} p;cNmMm
for (j = 1; j <= r - mid; j++) { $q,2VH:Ip
temp[r - j + 1] = data[j + mid]; -qaJ@T+J+7
} 5H#f;L\k
int a = temp[l]; *Z\B9mx
int b = temp[r]; U8Z(=*Z3
for (i = l, j = r, k = l; k <= r; k++) { .1<QB{4~v
if (a < b) { P}hHx<L
data[k] = temp[i++]; t=o2:p6&
a = temp; l Os91+.%
} else { o0nd]"q?
data[k] = temp[j--]; wm~35cF(
b = temp[j]; vFm8T58 7
} yXP+$oox9
} /ap3>xkt
} ){^o"A?-:
,]RMa\Q4Wg
/** fNe9as
* @param data .anXsjD%W
* @param l zLEl/yPE
* @param i r(WR=D{
*/ +.^BM/z^O
private void insertSort(int[] data, int start, int len) { t4(Z@X$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +*&bgGhT
} pFb}5Q
} 1) 7n (
} vOIK6-
} A) {q7WI
& -L$B
堆排序： k|V%*BvY>
Nki08qZ[
package org.rut.util.algorithm.support; tNP>6F/
+l'l*<
import org.rut.util.algorithm.SortUtil; N?7MYP
HZ%2WM
/** -Uj)6PzGu
* @author treeroot ?5'EP|<
* @since 2006-2-2 D>tex/Of3
* @version 1.0 ,5}%_
*/ @p`*MWU
public class HeapSort implements SortUtil.Sort{ fNR2(8;}
q,S[[{("
/* (non-Javadoc) -;]m4R)z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V$wW?+V
*/ 2OT RP4U
public void sort(int[] data) { 6L5j
MaxHeap h=new MaxHeap(); Q8-;w{%
h.init(data); N,kPR
for(int i=0;i h.remove(); xAJ N(8?
System.arraycopy(h.queue,1,data,0,data.length); 9~3;upWu!
} v *'anw&Z
aia`mO]
private static class MaxHeap{ AzFd#P
8(d Hn
void init(int[] data){ 0QJ :
this.queue=new int[data.length+1]; DpD19)ouy
for(int i=0;i queue[++size]=data; RHO|g0
fixUp(size); |T`ZK?B+u
} c,@&Z#IZ`
} U'4j+vUc
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private int size=0; >}~\*Y\8@
\e)>]C}h
private int[] queue; 9mA6nmp
HrOq>CSR
public int get() { i28WgDG)5
return queue[1]; A]<+Aq@{
} .,({&L
R:N4_4& C~
public void remove() { d `MTc
SortUtil.swap(queue,1,size--); J!{"^^*
fixDown(1); GgT 5'e;N
} vbA<=V*P
file://fixdown Kd='l~rby
private void fixDown(int k) { "Y'MuV'x
int j; 5;v_?M!UCK
while ((j = k << 1) <= size) { nR%ey"
if (j < size %26amp;%26amp; queue[j] j++; J[|4`GT
if (queue[k]>queue[j]) file://不用交换 8-#_xsZ^;
break; ov3FKMG?
SortUtil.swap(queue,j,k); "rl(%~Op
k = j; "aL.`^.
} x."R_>
} DUrfC[jpv
private void fixUp(int k) { ?.{SYaS
while (k > 1) { 90"&KDh
int j = k >> 1; |.#G G7F^S
if (queue[j]>queue[k]) 7Gh+EJJ3I
break; }H5~@c$
SortUtil.swap(queue,j,k); 7!qO*r
k = j; xdLMy#U2
} ()}(3>O-
} '@0Z#A
#}xw *)3
} s78MXS?py
/]1$Soo
} k3PFCl~e
+x!Hc
SortUtil： %[cZ,F=
kJ'rtz4QO
package org.rut.util.algorithm; :QoW*Gs1
0#G@F5; <
import org.rut.util.algorithm.support.BubbleSort; 42oW]b%P{;
import org.rut.util.algorithm.support.HeapSort; ~:krJ[=
import org.rut.util.algorithm.support.ImprovedMergeSort; qkbGM-H%U
import org.rut.util.algorithm.support.ImprovedQuickSort; zH5pe
import org.rut.util.algorithm.support.InsertSort; n2V $dF4m
import org.rut.util.algorithm.support.MergeSort; #}p@+rkg2
import org.rut.util.algorithm.support.QuickSort; Cg8s9qE?
import org.rut.util.algorithm.support.SelectionSort; +,Ud 3iS
import org.rut.util.algorithm.support.ShellSort; OH >#f6`[
Iwx~kvz\_(
/** wo+b":
* @author treeroot FG:t2ea
* @since 2006-2-2 yR3pK 0Y(?
* @version 1.0 mOC<a7#
*/ ROhhd.
public class SortUtil { H8x66}
public final static int INSERT = 1; T?g%I
public final static int BUBBLE = 2; c 8t
public final static int SELECTION = 3; Y&uwi:_g
public final static int SHELL = 4; h}y]Pt?
public final static int QUICK = 5; Zxw cqN
public final static int IMPROVED_QUICK = 6; Z g.La<#
public final static int MERGE = 7; 6!Q,XHs
public final static int IMPROVED_MERGE = 8; O0^?VW$y_
public final static int HEAP = 9; ]?7q%7-e.a
h/oC9?v
public static void sort(int[] data) { rD;R9b"J
sort(data, IMPROVED_QUICK); C+L_f_6]
} *t{^P*pc
private static String[] name={ 5O%?J-Hp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y'^+KU
}; XiL[1JM
;?G..,
private static Sort[] impl=new Sort[]{ g-~]^$
new InsertSort(), [xdi.6%
new BubbleSort(), gF>t+"+x
new SelectionSort(), im3BQIPR
new ShellSort(), 4%$#
new QuickSort(), it$w.v+W7V
new ImprovedQuickSort(), } *jmWP
new MergeSort(), +;ylld
new ImprovedMergeSort(), I=pFGU
new HeapSort() |s'5~+
}; i7b^b>B|e
:w<Ga8\tZ
public static String toString(int algorithm){ |jB/d@RE
return name[algorithm-1]; R=J5L36F
} @~QI3)=s
?j;,:n
public static void sort(int[] data, int algorithm) { 5m yQBKE
impl[algorithm-1].sort(data); MW2{w<-]7
} `F$lO2#k
BR-4L2[
public static interface Sort { udOdXz6K?
public void sort(int[] data); - i#Kpf
} ny"z<N&}/
MwC}
public static void swap(int[] data, int i, int j) { K|Xr~\=
int temp = data; | Rj"}SC
data = data[j]; )A$xt)}P!{
data[j] = temp; W6s-epsRmT
} ZY|$[>X!
} 0!b9%I=j