[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; P2nb&lVdu
} !2('Cq_^
int i1=l; ~D4%7U"dv
int i2=mid+1; 0!n6tz lT
for(int cur=l;cur<=r;cur++){ T/V 5pYl
if(i1==mid+1) >Ic)RPO9
data[cur]=temp[i2++]; az(u=}
else if(i2>r) <%(nF+rQA"
data[cur]=temp[i1++]; FS%Xq-c
else if(temp[i1] data[cur]=temp[i1++]; nKFua l3
else T/%s7!E
data[cur]=temp[i2++]; 3 *o l
} C^po*(W6
} ?PIOuN=
:VPZGzK4
} <B;l).[6
H\f.a R=
改进后的归并排序: -Kj^ l3w
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package org.rut.util.algorithm.support; o)P'H"Ki
Y9TaU]7]
import org.rut.util.algorithm.SortUtil; gE/O29Y
e+z_Rj%Y;I
/** G<C[A
* @author treeroot ]-$0?/`p8
* @since 2006-2-2 mis cmD
* @version 1.0 /\-qz$
*/ k,xY\r$
public class ImprovedMergeSort implements SortUtil.Sort { _u^ S[
)g9&fGYf
private static final int THRESHOLD = 10; i;1aobG
R1YRqk
/* \e5bxc
* (non-Javadoc) `0tzQ>ZQq
* TR8<=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hsVf/%
*/ g/b_\__A
public void sort(int[] data) { @)>9l&
int[] temp=new int[data.length]; m<>3GF,5bP
mergeSort(data,temp,0,data.length-1); blcd]7nK
} ]7C=.'Y
IYq)p /
private void mergeSort(int[] data, int[] temp, int l, int r) { 'IweN
int i, j, k; (u81p
int mid = (l + r) / 2; +$:bzo_u
if (l == r) CT@JNG$<"
return; .kSx>3
if ((mid - l) >= THRESHOLD) @N`) Z3P+
mergeSort(data, temp, l, mid); Y!LcS48X
else d v@B-l;
insertSort(data, l, mid - l + 1); g_G'%{T7
if ((r - mid) > THRESHOLD) 2*6b{}yJH
mergeSort(data, temp, mid + 1, r); /jQW4eW0
else y K~;LV
insertSort(data, mid + 1, r - mid); a%"My;8
GJ=<~S"
for (i = l; i <= mid; i++) { !5Ko^:+Y
temp = data; hL#5:~(
} XV+s 5C
for (j = 1; j <= r - mid; j++) { u@\]r 1
temp[r - j + 1] = data[j + mid]; H gMLh*
} +53 Tf
int a = temp[l]; 'W5r(M4U
int b = temp[r]; 9x/HQ(1
for (i = l, j = r, k = l; k <= r; k++) { ?Gc9^bB I
if (a < b) { LlP_`fA
data[k] = temp[i++]; s+>VqyHgf
a = temp; U+t|wK
} else { Gxu&o%x[
data[k] = temp[j--]; dUOvv/,FZT
b = temp[j]; kAbRXID
} [Y_6PR
} A.<HOx&#
} &k+G^ !=s#
Paz yY
/** xQX,1NbH5
* @param data jk2h"):B>
* @param l $v?+X20
* @param i 0 !yvcviw
*/ XJ~_FiB
private void insertSort(int[] data, int start, int len) { `y; s1nL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H
} E~5r8gM,0
} .L[WvAo
} F i?2sa
} L-\-wXg%
0x!XE|7I
堆排序： Yhl {'
3Xgf=yG:M
package org.rut.util.algorithm.support; ?y82S*sb#
PDaHY
import org.rut.util.algorithm.SortUtil; eOa:%{Kj
:B?XNo
/** oR>o/$z$)g
* @author treeroot U7d%*g
* @since 2006-2-2 |e@9YDZ
* @version 1.0 J&w%lYiu5
*/ K^bzZa+a
public class HeapSort implements SortUtil.Sort{ E]`)
lwhAF, '$
/* (non-Javadoc) ru,]!YPJE2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5;5;bBo~
*/ mAh0xgm
public void sort(int[] data) { d?(#NP#;
MaxHeap h=new MaxHeap(); 5inmFT?9Z
h.init(data); Q.Hy"~
for(int i=0;i h.remove(); nYG$V)iCb
System.arraycopy(h.queue,1,data,0,data.length); dg/OjiD[P
} 4Y5Q>2D}
BRF=TL5Z
private static class MaxHeap{ ',k0_n?t
Xxcv5.ug
void init(int[] data){ 3+_? /}<
this.queue=new int[data.length+1]; }R:e[lKj
for(int i=0;i queue[++size]=data; ^& ZlV
fixUp(size); ab8uY.j
} *[jG^w0z8~
} ]Ln2|$R
y6ntGrZ}$
private int size=0; ^OKCvdS
Szrr`.']
private int[] queue; 8MgoAX,p
)tGeQXVhbJ
public int get() { U2z1HIs
return queue[1]; !0:uM)_k
} tL(B gku9
,:UoE
public void remove() { RWtD81(oC'
SortUtil.swap(queue,1,size--); Yz;Hu$/
fixDown(1); WbC|2!
} Tct8NG
file://fixdown k L2(M6m
private void fixDown(int k) { Reca5r1O
int j; /gh=+;{
while ((j = k << 1) <= size) { &gxRw l
if (j < size %26amp;%26amp; queue[j] j++; h')@NnFP1
if (queue[k]>queue[j]) file://不用交换 S(Md
break; <U`lh
SortUtil.swap(queue,j,k); M7{w7}B0@
k = j; 8X`iMFa.P
} :RR<-N5+
} p%~#~5t,
private void fixUp(int k) { 8#NtZ
while (k > 1) { YKq,`7"%
int j = k >> 1; S'qEBz
if (queue[j]>queue[k]) )p'ZSXb
break; TB9{e!4
SortUtil.swap(queue,j,k); ,-^Grmr4M
k = j; O_aZ\28};C
} AFO g*{1
} }z6@Z#%q
;Ut0tm
} <RY5ZP
"']I.
} FI++A`
S05+G}[$
SortUtil： BYuF$[3ya&
4d3]L` f
package org.rut.util.algorithm; nsFOtOdd
L A-H
import org.rut.util.algorithm.support.BubbleSort; |f1 S&b.
import org.rut.util.algorithm.support.HeapSort; WGFp<R
import org.rut.util.algorithm.support.ImprovedMergeSort; {pMbkAQ@
import org.rut.util.algorithm.support.ImprovedQuickSort; aOWW..|
import org.rut.util.algorithm.support.InsertSort; j|"#S4IX)F
import org.rut.util.algorithm.support.MergeSort; |Fz/9+I
import org.rut.util.algorithm.support.QuickSort; fH?e9E4l
import org.rut.util.algorithm.support.SelectionSort; 5BnO-[3
import org.rut.util.algorithm.support.ShellSort; ]b!o(5m
B}_*0D
/** 0A\OZ^P8
* @author treeroot xayo{l=uGv
* @since 2006-2-2 wJM})O%SQ
* @version 1.0 TUoEk
*/ 1o\P7PLe
public class SortUtil { asqbLtQ
public final static int INSERT = 1; _4F(WCco
public final static int BUBBLE = 2; wYy=Tl-N
public final static int SELECTION = 3; *4#)or
public final static int SHELL = 4; ,.[T]37
public final static int QUICK = 5; $Kgw6
public final static int IMPROVED_QUICK = 6; S~L$sqt
public final static int MERGE = 7; rC.z772y%
public final static int IMPROVED_MERGE = 8; {/`iZzPg
public final static int HEAP = 9; Yl%1e|WV
`>&V_^y+
public static void sort(int[] data) { a;JB8
sort(data, IMPROVED_QUICK); -Yx'qz@
} %PozxF:
private static String[] name={ RGFanP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i[1K~yXq:
}; QcJ?1GwA"
=.`(KXT
private static Sort[] impl=new Sort[]{ .lnyn|MVb
new InsertSort(), S]&f+g}&w
new BubbleSort(), sy`@q<h(
new SelectionSort(), $sK8l=#
new ShellSort(), 5v6 x
new QuickSort(), HwTb753
new ImprovedQuickSort(), ^`>,~$Q
new MergeSort(), /f_w@TR\{
new ImprovedMergeSort(), 3lzjY.]Pgv
new HeapSort() CY~]lQ
}; xl [3*K
D/QSC]"
public static String toString(int algorithm){ >d-By
return name[algorithm-1]; ("07t/||
} R6l`IlG`
A;ip V :)
public static void sort(int[] data, int algorithm) { ZDEz&{3U;
impl[algorithm-1].sort(data); =@(&xfTC
} J%ng8v5ex
kt?G\H!}
public static interface Sort { y%%D="
public void sort(int[] data); {FRUB(68b
} ,aOi:aaZRT
j"6r]nc&
public static void swap(int[] data, int i, int j) { GJ"S*30
int temp = data; q6DuLFatc*
data = data[j]; &Omo\Oq&W>
data[j] = temp; lz2B,#
} 3z7SK Gy
} nvY3$ Ty