[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; `&/zOMp
} FkoN+\d
int i1=l; jZ69sDhE
int i2=mid+1; eJ$ {`&J
for(int cur=l;cur<=r;cur++){ UC9w T
if(i1==mid+1) =G<S!qW
data[cur]=temp[i2++]; X_I.f6v{
else if(i2>r) |<7nf75c}
data[cur]=temp[i1++]; zhde1JE
else if(temp[i1] data[cur]=temp[i1++]; r\{; ~V
else -Ar 3>d
data[cur]=temp[i2++]; K<Y-/t
} zd[cp@
} Lec%kC
#1f8A5<
} gCS%J40r
F(:]lM|
改进后的归并排序: rwdj
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package org.rut.util.algorithm.support; i+.bR.WO
/F @a@m|
import org.rut.util.algorithm.SortUtil; We#O'm
KY;E.D`
/** N+ R/ti
* @author treeroot 6~Xe$fP(
* @since 2006-2-2 ,t>/_pI+=
* @version 1.0 @AkD-}^[
*/ !7[Rhk7bW
public class ImprovedMergeSort implements SortUtil.Sort { dCMWv~>
~4~>;e
private static final int THRESHOLD = 10; C{):jH,Rf
y#;@~S1W
/* [mk!]r
* (non-Javadoc) 0IjQqI
* F%QVn.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ndx ]5
*/ 4;d9bd)A
public void sort(int[] data) { -T-h~5
int[] temp=new int[data.length]; CpICb9w
mergeSort(data,temp,0,data.length-1); D(<20b,
} +Gvf5+ 5VR
hu qQ0
private void mergeSort(int[] data, int[] temp, int l, int r) { pfvNVu
int i, j, k; |+i?FYA\
int mid = (l + r) / 2; dmD':1
if (l == r) wXsA-H/`
return; QFf lx
if ((mid - l) >= THRESHOLD) dPRGL hWF
mergeSort(data, temp, l, mid); e[8p/hId
else 7uRXu>h
insertSort(data, l, mid - l + 1); a|@^N
if ((r - mid) > THRESHOLD) . RNQlh3
mergeSort(data, temp, mid + 1, r); SQbnn"
else yN~: 3
insertSort(data, mid + 1, r - mid); Lw.N3!e[
vg1p{^N!
for (i = l; i <= mid; i++) { E8Wgm 8
temp = data; )f0t"lk
} !Hr +|HKQ?
for (j = 1; j <= r - mid; j++) { v 1O* Q
temp[r - j + 1] = data[j + mid]; hzc2c.gcF
} hU `H\LE
int a = temp[l]; %8+'L4
int b = temp[r]; =lG5Kc{B
for (i = l, j = r, k = l; k <= r; k++) { 8f|
if (a < b) { 0Q5ua`U
data[k] = temp[i++]; -K)P|'-?m
a = temp; g=:C/>g
} else { `7|v
data[k] = temp[j--]; N|h}'p
b = temp[j]; =`rESb[
} d&0^AvM@
} ^@`dsll
} HtIM8z#/
~>ACMO
/** 4>Q6!"
* @param data NPEs0|
* @param l G?d28p',.
* @param i z6R<*$4
*/ *Ta*0Fr=9|
private void insertSort(int[] data, int start, int len) { 0BIH.ZV#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kf$0}T`
} *,o)`
} J%_ :A"
} 'on, YEp
} @&d/}Mx"t
Jh[fFg]
堆排序： yHhBUpIo
|k+Y >I&
package org.rut.util.algorithm.support; y4Plm.
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import org.rut.util.algorithm.SortUtil; o$YL\ <qp
3%xj-7z W
/** SVaC)O(
* @author treeroot %Ow,.+m
* @since 2006-2-2 =8fp4#]7
* @version 1.0 dM7-,9Vc
*/ Vo"\nj
public class HeapSort implements SortUtil.Sort{ \ey3i((L
bY;ah;<
/* (non-Javadoc) oO>mGl36H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `hL16S
*/ 5>JrTO5
public void sort(int[] data) { dHzo_VV
MaxHeap h=new MaxHeap(); >t O(S
h.init(data); p}}o#a~V),
for(int i=0;i h.remove(); icHc!m?
System.arraycopy(h.queue,1,data,0,data.length); 4RNB\D
} Hc4]2pf
cyG3le& +G
private static class MaxHeap{ {v56k8uZ
<`a!%_LC [
void init(int[] data){ Cjsy1gA
this.queue=new int[data.length+1]; O%y.
for(int i=0;i queue[++size]=data; $ T.c>13
fixUp(size); V\WqA8
} 6<R!`N 6
} ]7-*1kL8=~
^6|Q$]}Ok
private int size=0; 3xh~xE
\:\rkc9LI
private int[] queue; X61]N^y
%X O97
public int get() { .T/\5_Bx
return queue[1]; vVmoV0kGt
} =zt@*o{F
)avli@W-3j
public void remove() { InMF$pw
SortUtil.swap(queue,1,size--); +hRAU@RA
fixDown(1); *obBo6!zM
} Y dmYE$
file://fixdown <MI>>$seiJ
private void fixDown(int k) { \L(~50{(
int j; pog*}@OS
while ((j = k << 1) <= size) { KE`}P<K&
if (j < size %26amp;%26amp; queue[j] j++; JVFn=Mw
if (queue[k]>queue[j]) file://不用交换 _1f!9ghT\
break; \SS1-UbL
SortUtil.swap(queue,j,k); <|~X,g;f
k = j; <l(LQmM;
} )}1J.>5
} r%JJ5Al.S
private void fixUp(int k) { hdp;/Qz&
while (k > 1) { S.aSNH<
int j = k >> 1; r'uD|T H
if (queue[j]>queue[k]) Oj6-
break; YgCJ s;
SortUtil.swap(queue,j,k); 0$%:zHi5g
k = j; dQQh$*IL?{
} 3G dWq*
} WrQe'ny
c%yhODq/
} %,E\8{I+
PW x9CT
} +;tXk
U@!e&QPn
SortUtil： +LCpE$H
nc!P !M
package org.rut.util.algorithm; Wqy|Y*$qT
L]3 V)`}
import org.rut.util.algorithm.support.BubbleSort; >fJY
import org.rut.util.algorithm.support.HeapSort; Lqb9gUJ:U
import org.rut.util.algorithm.support.ImprovedMergeSort; #!l\.:h%
import org.rut.util.algorithm.support.ImprovedQuickSort; V<Q''%k
import org.rut.util.algorithm.support.InsertSort; LWuciHfd+
import org.rut.util.algorithm.support.MergeSort; V6B`q;lA
import org.rut.util.algorithm.support.QuickSort; j]#qq]c
import org.rut.util.algorithm.support.SelectionSort; 'z8?_{$
import org.rut.util.algorithm.support.ShellSort; Q\z6/1:9Z
Jw)Uk< \
/** ~oy=2Q<Z
* @author treeroot d`q<!qFZh
* @since 2006-2-2 `h}fS4CO
* @version 1.0 {b6| wQ\
*/ s4/4o_[W
public class SortUtil { :a @_GIC
public final static int INSERT = 1; > L_kSC?
public final static int BUBBLE = 2; sa$CCQ
public final static int SELECTION = 3; 8i/5L=a"`
public final static int SHELL = 4; '/%]B@!
public final static int QUICK = 5; zgXg-cr
public final static int IMPROVED_QUICK = 6; +Kw:z?
public final static int MERGE = 7; :sAb'6u1EU
public final static int IMPROVED_MERGE = 8; D^8]+2r
public final static int HEAP = 9; S=B?bD_,c
3oc p4x`[
public static void sort(int[] data) { z{Z4{&M
sort(data, IMPROVED_QUICK); \ :To\6\Ri
} .R'<v^H
private static String[] name={ ,RjE?M%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )voJq\Y)%
}; S-l<+O1fy
q#B=PZ'NA
private static Sort[] impl=new Sort[]{ Ut.%=o;&[
new InsertSort(), /.P9n9
new BubbleSort(), !Hq$7j_
new SelectionSort(), 4zyN>f|
new ShellSort(), OGW,[k=2{
new QuickSort(), A!B:vJ
new ImprovedQuickSort(), /9T.]H~
new MergeSort(), _)-t#Ve
new ImprovedMergeSort(), fUj[E0yOF
new HeapSort() C+o1.#]JM
}; n-zAkKM
T%74JRQ
public static String toString(int algorithm){ ~(i#A>
return name[algorithm-1]; >-U'mkIH
} 3L}eFg,d
3-x ;_
public static void sort(int[] data, int algorithm) { *\Z9=8yK
impl[algorithm-1].sort(data); s^f7w
} K#Ia19au5
yp}J+/PX}
public static interface Sort { QS7<7+
public void sort(int[] data); NULew]:5
} |i_+b@Lul
_y:-_q
public static void swap(int[] data, int i, int j) { )Fk*'6
int temp = data; 9o%k [n
data = data[j]; e1cqzhI=nA
data[j] = temp; e}lF#$
} tVfZ~qJ
} ) uM*`%