[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; ]}lt^7\=
} Y>w7%N
int i1=l; Fc@R,9
int i2=mid+1; 5c3-?u!
for(int cur=l;cur<=r;cur++){ YA,~qT|
if(i1==mid+1) lND2Kb
data[cur]=temp[i2++]; OC*28)
else if(i2>r) z |llf7:
data[cur]=temp[i1++]; 4 9N.P;b
else if(temp[i1] data[cur]=temp[i1++]; Lo'pNJH;$
else Oe1WnS 7(]
data[cur]=temp[i2++]; KGM__ZO.
} N<i5X.X
} oaqH@`
@U8u6JNK'
} JWd[zJ[
h"+7cc@
改进后的归并排序: *Z"`g %,;
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package org.rut.util.algorithm.support; H2BRId
P9yMf~
import org.rut.util.algorithm.SortUtil; %Zk6K!MY#
OJpfiZ@Q_
/** [TOo9W
* @author treeroot chL1r9V)v
* @since 2006-2-2 iOg4(SPci
* @version 1.0 ]uox ^HC
*/ x3&gB`j-
public class ImprovedMergeSort implements SortUtil.Sort { BzS4:e<
E;CM"Y*
private static final int THRESHOLD = 10; qZ^ PC-
'wEQvCS
/* <z\SKR[
* (non-Javadoc) ]TT >3"Dw7
* fYjmG[4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =xm7i#1
*/ IWu=z!mO
public void sort(int[] data) { j5/pVXO
int[] temp=new int[data.length]; x4_MbUe
mergeSort(data,temp,0,data.length-1); ldUZ\z(*
} s0dP3tz>
iY/2 `R
private void mergeSort(int[] data, int[] temp, int l, int r) { #4mRMsW5"
int i, j, k; 3h:~NL
int mid = (l + r) / 2; jzV"(p!
if (l == r) 0YFXF
return; 3[u- LYW
if ((mid - l) >= THRESHOLD) lo>9 \ Po
mergeSort(data, temp, l, mid); -$<oY88
else )nO ^Ay
insertSort(data, l, mid - l + 1); }R<t=):
if ((r - mid) > THRESHOLD) t9U6\ru
mergeSort(data, temp, mid + 1, r); V?S}%-a
else je^VJ&ac
insertSort(data, mid + 1, r - mid); syBpF:`-W
Lbrl CB+
for (i = l; i <= mid; i++) { 7he,(V
temp = data; ?@4Mt2Z\
} AB/${RGf+
for (j = 1; j <= r - mid; j++) { */h(4Hz
temp[r - j + 1] = data[j + mid]; 3XlQ4
} fE~KWLm
int a = temp[l]; se %#U40*
int b = temp[r]; |1!fuB A
for (i = l, j = r, k = l; k <= r; k++) { ij0I!ilG4
if (a < b) { g7]S
data[k] = temp[i++]; U!q2bF<@
a = temp; x t-s"A
} else { @/kI;8
data[k] = temp[j--]; ]:Ep1DIMl
b = temp[j]; K9EHT-
} >hNSEWMY`
} n{!{,s
} UCcr>
Pg T3E
/** +pqbl*W;1
* @param data s 1M-(d Q
* @param l 8<;.
* @param i zK~8@{l}_"
*/ 3R<r[3WP
private void insertSort(int[] data, int start, int len) { ;GM`=M4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )1Bz0:
} >KuNHuHu
} {mD0ug
} #6\mTL4vg
} fQib?g/G
|iUF3s|?
堆排序： C&Q[[k"kb
c9[{P~y
package org.rut.util.algorithm.support; :epBd3f
U>*@VOgB
import org.rut.util.algorithm.SortUtil; C'[4jz0xF
F}l3\uC]
/** |u%;"N'p)
* @author treeroot aQ(P#n>a2
* @since 2006-2-2 zqj|$YNC
* @version 1.0 EwzcB\m
*/ 1sg:8AA
public class HeapSort implements SortUtil.Sort{ ,Dv*<La`\
fGV'l__\\
/* (non-Javadoc) 25Z}.))
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W]Xwt'ABz
*/ %R4 \[e
public void sort(int[] data) { DtBvfYO8)>
MaxHeap h=new MaxHeap(); HR?T
h.init(data); Wy-_}wqHg
for(int i=0;i h.remove(); AAfU]4u0S
System.arraycopy(h.queue,1,data,0,data.length); ,K}"o~z
} 'yH
&V+_b$
private static class MaxHeap{ $&.(7F^D
3_wR2AU~
void init(int[] data){ EFDmNud`Q
this.queue=new int[data.length+1]; [@qjy*5p
for(int i=0;i queue[++size]=data; $A~aNI
fixUp(size); ILDO/>n
} &V axv$v}
} !j7mY9x+
AB%i|t
private int size=0; " l|`LjP5M
[H\0 '
private int[] queue; r[ k
<[ dt2)%L>
public int get() { " TCJT390
return queue[1]; h(kPf]0
} wclj9&k
$'CS/U`E}
public void remove() { r ts2Jk7f
SortUtil.swap(queue,1,size--); <=|^\r !}&
fixDown(1); 1:<n(?5JI
} p}==aNZK
file://fixdown "a;$uW@.6
private void fixDown(int k) { 7@ONCG
int j; j9c:SP5
while ((j = k << 1) <= size) { q<.k:v&
if (j < size %26amp;%26amp; queue[j] j++; U^[AW$WzU
if (queue[k]>queue[j]) file://不用交换 i;~.kgtq4
break; Ge=6l0
SortUtil.swap(queue,j,k); U4dfO=
k = j; Hj`'4
} 9?sY!gXc
} dCn9]cj/
private void fixUp(int k) { n\Lsm
while (k > 1) { T] H'l
int j = k >> 1; 8)iI=,T*
if (queue[j]>queue[k]) zytW3sTZA
break; GBZu<t/
SortUtil.swap(queue,j,k); m==DBh
k = j; z+oy#p6+F.
} 7~"eT9WV
} i,~(_|-r
GNHXtu6
} V&j]*)
])qnPoQ<n
} PfYeV/M|
]4c*Nh%8
SortUtil： "MzBy)4Q
A]QGaWK
package org.rut.util.algorithm; jK\kASwG
30w(uF
import org.rut.util.algorithm.support.BubbleSort; ~~WY?I-
import org.rut.util.algorithm.support.HeapSort; P;XA|`&
import org.rut.util.algorithm.support.ImprovedMergeSort; #(}{*dR
import org.rut.util.algorithm.support.ImprovedQuickSort; |2TH[J_a
import org.rut.util.algorithm.support.InsertSort; )X*_oH=
import org.rut.util.algorithm.support.MergeSort; c'?EI EP
import org.rut.util.algorithm.support.QuickSort; "<egm^Yq
import org.rut.util.algorithm.support.SelectionSort; ORX<ZOt1
import org.rut.util.algorithm.support.ShellSort; 7^.g\Kt?
Iw] ylp
/** D)4#AI
* @author treeroot n|.eL8lX.<
* @since 2006-2-2 ^Hf?["m^@
* @version 1.0 {LKW%G7
*/ `:ZaT('h
public class SortUtil { mV}8s]29
public final static int INSERT = 1; ;x_T*} CH
public final static int BUBBLE = 2; ;O>zA]Z8r
public final static int SELECTION = 3; YJwI@E(l$
public final static int SHELL = 4; 9^sz,auB
public final static int QUICK = 5; /3Y"F"`M.
public final static int IMPROVED_QUICK = 6; ~_CZ1
public final static int MERGE = 7; HYdt3GtJ?
public final static int IMPROVED_MERGE = 8; k;Qm%B
public final static int HEAP = 9; "kc%d'c(
0"\js:-$
public static void sort(int[] data) { yHf^6|$8
sort(data, IMPROVED_QUICK); {J)gS
} rx#GrV*y
private static String[] name={ Wxj(3lg/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wl&6T1A`"
}; +sZY0(|K8
FD~uUZTM
private static Sort[] impl=new Sort[]{ ~t*_
new InsertSort(), _Nz?fJ:$@
new BubbleSort(), Z~w?Qm:/
new SelectionSort(), `]6W*^'PD
new ShellSort(), c.-dwz
new QuickSort(), 6~!7?FK
new ImprovedQuickSort(), KCa@0
new MergeSort(), um".Z4S
new ImprovedMergeSort(), T.{]t6t$U
new HeapSort() 9QF,ynE
}; W^,p2
Ly`.~t(~l
public static String toString(int algorithm){ MnY}U",
return name[algorithm-1]; !8 l&%
} r;waT@&C
{A MAQ
public static void sort(int[] data, int algorithm) { A$zC$9{0I
impl[algorithm-1].sort(data); ?56;<%0
} s<C66z
p)Ht =~
public static interface Sort { F CfU=4O
public void sort(int[] data); L?(1 [jB4G
} T-oUcuQB
]xV2=!J
public static void swap(int[] data, int i, int j) { apxq] ! `
int temp = data; &oVZ2.O#(
data = data[j]; <&1hJ)O
data[j] = temp; V22Br#+
} f0{tBD!%
} up?S (.*B