[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; AIh*1>2Xn
} /\J|Uj
int i1=l; iYKU[UP?
int i2=mid+1; +.@c{5J<
for(int cur=l;cur<=r;cur++){ ?2ItB`<(
if(i1==mid+1) .N"~zOV<#
data[cur]=temp[i2++]; \84v-VK
else if(i2>r) OVR?*"N_
data[cur]=temp[i1++]; zZ=$O-&%
else if(temp[i1] data[cur]=temp[i1++]; PLdn#S}.
else VVuR+=.&
data[cur]=temp[i2++]; nbmc[!PwG
} \.<KA
} -$YJfQE6G
>F3.c%VU]w
} maC>LBa2/
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改进后的归并排序: (}gcY
vPmnN^
package org.rut.util.algorithm.support; Mo^`\/x!
4D"4zp7
import org.rut.util.algorithm.SortUtil; S~3\3qt$
3t(c_:[%
/** {'R)4hL
* @author treeroot Hk;-5A|9
* @since 2006-2-2 mhzYz;}
* @version 1.0 6RK\}@^=K
*/ 2z\;Q8g){r
public class ImprovedMergeSort implements SortUtil.Sort { SW9fE:v
Gt~JA0+C)7
private static final int THRESHOLD = 10; `.^ |]|u
w sY}JT
/* AyVrk 8G
* (non-Javadoc) n29(!10Px
* 1 Z[f {T)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #I%s3
*/ z"379b7cN
public void sort(int[] data) { 4|Ui?.4=
int[] temp=new int[data.length]; T20VX 8gX
mergeSort(data,temp,0,data.length-1); YD&_^3-XM
} !buz<h
3?E}t*/
private void mergeSort(int[] data, int[] temp, int l, int r) { S>f&6ZDNY(
int i, j, k; `\b+[Nes
int mid = (l + r) / 2; *%A}x
if (l == r) u\g,.C0
return; U5+vN[ K
if ((mid - l) >= THRESHOLD) |_zO_Frtp
mergeSort(data, temp, l, mid); '^}+Fv<O
else P))^vUt~
insertSort(data, l, mid - l + 1); u#jC#u^M
if ((r - mid) > THRESHOLD) {#hVD4$b
mergeSort(data, temp, mid + 1, r); r<yhI>>;<
else $[(d X!]F
insertSort(data, mid + 1, r - mid); !7 _\P7M
U^_D|$6
for (i = l; i <= mid; i++) { lLiQ;@
temp = data; 3 ^}A %-bS
} f)6))
for (j = 1; j <= r - mid; j++) { N|dD!
temp[r - j + 1] = data[j + mid]; Qv{,wytyO
} M_1;$fWq
int a = temp[l]; ' 4O-
int b = temp[r]; :uK btoA
for (i = l, j = r, k = l; k <= r; k++) { O\Eqr?%L)
if (a < b) { 0k[2jh
data[k] = temp[i++]; AsxD}Nw[Z*
a = temp; nhH;?D3
} else { qX6D1X1_
data[k] = temp[j--]; 8ws$k\>
b = temp[j]; q7Es$zjX
} oF|N O^H
} p>kq+mP2bc
} 8r:M*25
I1=(. *B}
/** npH?4S-8G
* @param data ?F@%S3h.
* @param l ,=PKd&
* @param i mTf<
*/ $8=@R'
private void insertSort(int[] data, int start, int len) { &ab|2*3?X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2QUx&u:
} l]!B#{
} 6X_\Ve
} h @/;`E[
} aMwB>bt
K1q+~4>\|
堆排序： \3zj18(@8!
7@;">`zvm
package org.rut.util.algorithm.support; sqO<J$tz
cxP&^,~
import org.rut.util.algorithm.SortUtil; MC!ZX)mF
q]c5MlJXF
/** ";NRzY
* @author treeroot U ?b".hJ2
* @since 2006-2-2 [r-}bp'Gp
* @version 1.0 07_oP(;jT
*/ *@S@x{{s
public class HeapSort implements SortUtil.Sort{ W>-B [5O&[
a.%LHb
/* (non-Javadoc) ?J!3j{4e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #@f[bP}a
*/ 1~yZ T
public void sort(int[] data) { 9lzQ\}
MaxHeap h=new MaxHeap(); \k@$~}xD,
h.init(data); WZewPn>#q
for(int i=0;i h.remove(); EbK0j?
System.arraycopy(h.queue,1,data,0,data.length); )u} Q:`9
} \ v2H^j/
F4C!CUI
private static class MaxHeap{ {^ec(EsO#
K`6z&*
void init(int[] data){ "&o,yd%
this.queue=new int[data.length+1]; %,V YiW0
for(int i=0;i queue[++size]=data; Dd $qQ
fixUp(size); 4_=Ja2v8;`
} LJTo\^*
} q9*MNHg}
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private int size=0; ;sOsT?)7$
Va<eusl
private int[] queue; .zj0Jy8N
x4kWLy7Sz
public int get() { `dkV_ O0
return queue[1]; v/Pw9j!r;m
} %V_-%/3Z
2W<n5o
public void remove() { 5 t{ja
SortUtil.swap(queue,1,size--); 6[P-Ny{z
fixDown(1); l]LxL
} \Sy7"a
file://fixdown -*ELLY[
private void fixDown(int k) { "MOpsb,
int j; 7}o/:
while ((j = k << 1) <= size) { UE0$ o?
if (j < size %26amp;%26amp; queue[j] j++; J./d!an
if (queue[k]>queue[j]) file://不用交换 PGn);Baq
break; ]!"S+gT*C
SortUtil.swap(queue,j,k); ](0mjE04<d
k = j; ^>c8t_RG
} +Wn&,?3^
} q0xjA
private void fixUp(int k) { :QQlI
while (k > 1) { '?5j[:QY@
int j = k >> 1; Qs 2.ef?
if (queue[j]>queue[k]) hwnJE958L
break; 3z =^(Y
SortUtil.swap(queue,j,k); eny/ fm
k = j; Sb&lhgW]c
} s95F#>dr
} HTjkR*E
hUpnI@
} ,_v|#g@{
+b$S~0n
} Q(7ob}+jQ
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SortUtil： s}5+3f$f
hlJpElYf
package org.rut.util.algorithm; KM,|} .@:
wEft4o
import org.rut.util.algorithm.support.BubbleSort; w`HI]{hE~N
import org.rut.util.algorithm.support.HeapSort; |}&RXD
import org.rut.util.algorithm.support.ImprovedMergeSort; Kyg=$^{>G
import org.rut.util.algorithm.support.ImprovedQuickSort; sp9W?IJ 6c
import org.rut.util.algorithm.support.InsertSort; ?,knit2x
import org.rut.util.algorithm.support.MergeSort; 7N8H)X
import org.rut.util.algorithm.support.QuickSort; a|j%n
import org.rut.util.algorithm.support.SelectionSort; T/r#H__`
import org.rut.util.algorithm.support.ShellSort; #E7AmmqD%
77 r(*.O|
/** m"2d$vro"
* @author treeroot ;^){|9@
* @since 2006-2-2 NaUr!s
* @version 1.0 _s.;eHp,
*/ k\r(=cex6
public class SortUtil { MmTC=/j
public final static int INSERT = 1; (<*e
public final static int BUBBLE = 2; G'z{b$?/[
public final static int SELECTION = 3; "UVFU-Z
public final static int SHELL = 4; "hz\Z0zg2
public final static int QUICK = 5; {MdLX.ycc)
public final static int IMPROVED_QUICK = 6; ? zDa=7 J
public final static int MERGE = 7; qPGuo5^
public final static int IMPROVED_MERGE = 8; @p=AWi}\
public final static int HEAP = 9; wBk@F5\<
v4/-b4ET
public static void sort(int[] data) { L5YnG_M&
sort(data, IMPROVED_QUICK); ,FzeOSy'p
} XMN:]!1J
private static String[] name={ GwU?wIIj^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c"tJld5F_
}; ow'Vz Ay-
,3i,P(?(
private static Sort[] impl=new Sort[]{ 0C%W&;r0
new InsertSort(), p>=[-(mt
new BubbleSort(), bvBHYf:^
new SelectionSort(), {XurC}#\
new ShellSort(), Y/ot3[
new QuickSort(), z&8un%Jt
new ImprovedQuickSort(), Ter:sge7
new MergeSort(), "Ml&[Oge
new ImprovedMergeSort(), VhGs/5
new HeapSort() ?L) !pP]
}; mog[pu:!,
SzDKByi
public static String toString(int algorithm){ hg@}@Wq\)
return name[algorithm-1]; q"qo.TPh|$
} 7}O.wUKw%
)jrT6x^IB
public static void sort(int[] data, int algorithm) { LA3<=R]
impl[algorithm-1].sort(data); ?|{XZQ~
} NG&_?|OmV
%6%<?jZ
public static interface Sort { wd@aw/
public void sort(int[] data); $h[QQ-
} :K82sCy%5
)}%O>%
public static void swap(int[] data, int i, int j) { _96~rel_P
int temp = data; ?YM4b5!3T
data = data[j]; C`jM0Q
data[j] = temp; _M[,!{C
} -m= 8&B
} YT/kC'A