[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; iH( K[F /
} =2)5_/9au
int i1=l; OsAXHjX}
int i2=mid+1; Z.:5<oEKg
for(int cur=l;cur<=r;cur++){ Yk:fV&]
if(i1==mid+1) D_9&=aa'
data[cur]=temp[i2++]; =6j 5,
else if(i2>r) 3.Qf^p
data[cur]=temp[i1++]; ~7b'4\
else if(temp[i1] data[cur]=temp[i1++]; s+tS4E?
else C%"h1zWE:
data[cur]=temp[i2++]; <k5FlvE2
} $ZXy&?4
} r['T.yo
.?_wcp=
} N*lq)@smq
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改进后的归并排序: Fkz+Qz
R',|Jf=`
package org.rut.util.algorithm.support; vP3Fb;
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import org.rut.util.algorithm.SortUtil; Cr4shdN34
l?a(=
/** u|WX?@\
* @author treeroot R/b)hP~
* @since 2006-2-2 5cxA,T
* @version 1.0 rc*3k
*/ 5gGYG]*l
public class ImprovedMergeSort implements SortUtil.Sort { >('L2]4\v
:{LVS nG
private static final int THRESHOLD = 10; wv ,F>5P
AT+|}B!
/* ZGzrh`j{-
* (non-Javadoc) }9:\#
* }&rf'E9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fbwo2qe@K
*/ Q2^}NQO=
public void sort(int[] data) { M$%aX,nk'
int[] temp=new int[data.length]; 3l`yy])t
mergeSort(data,temp,0,data.length-1); [G[HQ)A
} b\][ x6zJp
_myam3[W
private void mergeSort(int[] data, int[] temp, int l, int r) { !;'U5[}8
int i, j, k; EZIMp8^
int mid = (l + r) / 2; o&;+!Si@T
if (l == r) {NKDmeg:D
return; y= cBpC
if ((mid - l) >= THRESHOLD) ;r- \h1iA'
mergeSort(data, temp, l, mid); ]Vl*!,(i
else %I(N
insertSort(data, l, mid - l + 1); =^q:h<
if ((r - mid) > THRESHOLD) O<iE,PN)
mergeSort(data, temp, mid + 1, r); r&1N8o
else e@Z(z^V
insertSort(data, mid + 1, r - mid); AvEJX0"\df
JF%+T yMe
for (i = l; i <= mid; i++) { ^%#v AS
temp = data; OjE wJ$$
} !z(POK
for (j = 1; j <= r - mid; j++) { bW3e*O$V
temp[r - j + 1] = data[j + mid]; q'3=
} *FK!^Y
int a = temp[l]; -:a 9'dT
int b = temp[r]; iIcO_ZyA
for (i = l, j = r, k = l; k <= r; k++) { "]kaaF$U%
if (a < b) { V`S6cmwdc\
data[k] = temp[i++]; GZXUB0W\@)
a = temp; uzho>p[ae
} else { H`),PY2
data[k] = temp[j--]; +X cB5S>
b = temp[j]; q^([ & +
} l]T|QhiVd
} ZaH<\`=%
} qK.8^{b
jf*M}Q1jHE
/** zg)Z2?K|;u
* @param data t \DS}3pv
* @param l e]uk}#4
* @param i U,[vfSDGr
*/ rbO9NRg>
private void insertSort(int[] data, int start, int len) { 9"=:\PE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B\KvKT|\
} , YTuZS
} `Kpn@Xg
} Sw%=/g
} SL pd~ZC?
Z7K;~*
堆排序： vs7Hg)F
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package org.rut.util.algorithm.support; mJ#u]tiL
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import org.rut.util.algorithm.SortUtil; k/j]*~"
r<UZ\d -
/** Xv]O1fcI
* @author treeroot fk#SD "iJ
* @since 2006-2-2 2o6KVQ
* @version 1.0 TN.mNl%
*/ 1q}iUnR
public class HeapSort implements SortUtil.Sort{ tP"C>#LO
zK k;&y|{
/* (non-Javadoc) k~`pV/6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \uQ(-ji
*/ B3c rms['
public void sort(int[] data) { Cbx/
MaxHeap h=new MaxHeap(); *S:^3{.m=
h.init(data); \[B5j0vV,
for(int i=0;i h.remove(); &P&M6v+
System.arraycopy(h.queue,1,data,0,data.length); Zh{Pzyp
} yJppPIW^
-%5*c61
private static class MaxHeap{ (pREo/T
< :<E~anH
void init(int[] data){ 8JJqEkQ
this.queue=new int[data.length+1]; |@sUN:G4k
for(int i=0;i queue[++size]=data; Z8z.Xn
fixUp(size); ucL}fnY1
} C6M|A3^T
} Eu l,1yR
)ra_`Qdcf
private int size=0; PUuxKW}
=Qsh3b&<P
private int[] queue; vfK^^S
HIk5Q'ek
public int get() { ymrmvuh
return queue[1]; #:3ca] k
} =A$5~op%
/v U$62KA
public void remove() { ]- ")r
SortUtil.swap(queue,1,size--); !)?n n3
fixDown(1); P5P:_hr
} l"W9uS;\T
file://fixdown }/4 AT
private void fixDown(int k) { 3PIZay
int j; ?k TVC
while ((j = k << 1) <= size) { }cn46L%/
if (j < size %26amp;%26amp; queue[j] j++; `J'xVq#O
if (queue[k]>queue[j]) file://不用交换 *l)_&p
break; ?S~HnIn
SortUtil.swap(queue,j,k); O6pswMhAc
k = j; }JeGjpAcV
} g"EvMv&
} 4&r[`gL
private void fixUp(int k) { )iNMjg
while (k > 1) { 9s>q4_D
int j = k >> 1; WldlN?[j
if (queue[j]>queue[k]) =kp#v
break; B:\\aOEj
SortUtil.swap(queue,j,k); Pv17wUB
k = j; ~pO6C*"
} Aq yR+
} IlVz 5#R
e=<knKc Q
} GPONCL8(0
E2 Q[
} {pH{SRM)B
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SortUtil： oM G8?p
R9A8)dDz
package org.rut.util.algorithm; ",!#7h
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import org.rut.util.algorithm.support.BubbleSort; v8Vw.Ce`f
import org.rut.util.algorithm.support.HeapSort; ;PCnEs
import org.rut.util.algorithm.support.ImprovedMergeSort; NoTEbFrV
import org.rut.util.algorithm.support.ImprovedQuickSort; Se.\wkl#Y
import org.rut.util.algorithm.support.InsertSort; #k&"Rv;,
import org.rut.util.algorithm.support.MergeSort; VCSHq&p8
import org.rut.util.algorithm.support.QuickSort; i ?&t@"'
import org.rut.util.algorithm.support.SelectionSort; twv|,kM
import org.rut.util.algorithm.support.ShellSort; 48hu=,)81*
=iW!Mq
/** Ebw1 %W KC
* @author treeroot $N'AZY]4]
* @since 2006-2-2 ]-QY, k
* @version 1.0 w#vSZbh
*/ Zyt,D|eWj
public class SortUtil { HY0q!.qog
public final static int INSERT = 1; hiq7e*Nsb
public final static int BUBBLE = 2; >Akrbmh5
public final static int SELECTION = 3; 9>yLSM,!rS
public final static int SHELL = 4; N[~{'i
public final static int QUICK = 5; 4QC"|<9R
public final static int IMPROVED_QUICK = 6; >L\$
public final static int MERGE = 7; Veo*-sl
public final static int IMPROVED_MERGE = 8; _0N=~`'
public final static int HEAP = 9; 0zQ"5e?qy
U_i%@{
public static void sort(int[] data) { K&Ner(/X`6
sort(data, IMPROVED_QUICK); ZG[P?fM
} @ x_.
private static String[] name={ 3#N'nhUzA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1/X@~
}; K2$ fKju
kW#,o9f\
private static Sort[] impl=new Sort[]{ #hG0{_d7
new InsertSort(), 1N6.r:wg)%
new BubbleSort(), h DpIwzJ
new SelectionSort(), 7=i8$v&GX
new ShellSort(), YXz*B5R
new QuickSort(), ,)/gy)~#
new ImprovedQuickSort(), -FQ!
new MergeSort(), Ne<={u%
new ImprovedMergeSort(), x\PZ.o
new HeapSort() %LyZaU_sB
}; <7'`N\a
a%| I'r
public static String toString(int algorithm){ FvYgpbEZ
return name[algorithm-1]; |osu4=s|
} XJg8-)T#
j/.$ (E
public static void sort(int[] data, int algorithm) { \ #<.&`8B
impl[algorithm-1].sort(data); EQe!&;
} "NEg]LB5
}L mhM
public static interface Sort { !dnCrR
public void sort(int[] data); g)0>J
} ~o{GQ>
w-iu/|}
public static void swap(int[] data, int i, int j) { < z':_,
int temp = data; V"Cx5#\7C
data = data[j]; I(^pIe-
data[j] = temp; {1?94rz
} e&~vO| 3w%
} LGnb"ZN