[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; dF,FH-
} 5^dw!^d
int i1=l; `R> O5Rv
int i2=mid+1; t5k&xV=~ #
for(int cur=l;cur<=r;cur++){ )yP>}ME
if(i1==mid+1) o7+/v70D
data[cur]=temp[i2++]; _~kcr5
else if(i2>r) i/~J0qQ
data[cur]=temp[i1++]; P Cf|^X#B
else if(temp[i1] data[cur]=temp[i1++]; wl%1B64
else LJy'wl
data[cur]=temp[i2++]; 54{"ni2a
} $T4PC5.
} .+|DN"PgJ
hLvv:C@
} Vk (bU=w
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改进后的归并排序: K9q~Vf
`O{Uz?#*x
package org.rut.util.algorithm.support; $-RhCnE
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import org.rut.util.algorithm.SortUtil; *K(xES!b
1I`D$Xq~:
/** 07|NPS
* @author treeroot B<LavX>F
* @since 2006-2-2 %&XX*& q
* @version 1.0 WFd2_oAT
*/ iV&#5I
public class ImprovedMergeSort implements SortUtil.Sort { /v{[Z&z
*eP4dGe&
private static final int THRESHOLD = 10; o zYI/b^
N::;J
/* >{S$0D
* (non-Javadoc) =oME~oB~
* S;'eoqN8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c)8wO=!
*/ Ic K=E]p
public void sort(int[] data) { LXLDu2/@
int[] temp=new int[data.length]; u-_$?'l;~
mergeSort(data,temp,0,data.length-1); 7gwZ9Fob
} 1l_}O1
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private void mergeSort(int[] data, int[] temp, int l, int r) { .;b> T
int i, j, k; uKy*N*}
int mid = (l + r) / 2; =T)2wcXBB
if (l == r) ib_Gy77Os
return; X6,9D[Nw
if ((mid - l) >= THRESHOLD) ^wa9zs2s;/
mergeSort(data, temp, l, mid); <k](s
else ~ ""MeaM8[
insertSort(data, l, mid - l + 1); s%oAsQ_y
if ((r - mid) > THRESHOLD) #P#R~b]
mergeSort(data, temp, mid + 1, r); [bG>qe1}&
else $O'2oeM
insertSort(data, mid + 1, r - mid); *fSM'q;
%j">&U.[
for (i = l; i <= mid; i++) { p2vBj.*J
temp = data; jtv Q<4
} ogqV]36Idh
for (j = 1; j <= r - mid; j++) { wsrx|n[]
temp[r - j + 1] = data[j + mid]; p*,P%tX
} :XSc#H4
int a = temp[l]; RRqMwy>%
int b = temp[r]; ib\[ ~rg
for (i = l, j = r, k = l; k <= r; k++) { Wk?|BR]O
if (a < b) { Vb^s 'k
data[k] = temp[i++]; 4i/q^;`
a = temp; 2^6TrZA7M6
} else { ,6O9#1A&i
data[k] = temp[j--]; @/~k8M/
b = temp[j]; 1fW4=pF-K
} Rr4CcM
} i*R:WTw#
} |OZ>/l {
O'-Zn]@.]
/** #0g#W
* @param data 'c0'P%[5A
* @param l YeC,@d[
* @param i Y@H,Lk
*/ npcBpGL{
private void insertSort(int[] data, int start, int len) { D?}m h1#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yvWzc uL#
} ~f10ZB_k>'
} \'+{X(]
} i @9Qb
} f WjS)
`qDz=,)WP
堆排序： ,{?bM
]ZGvRA&
package org.rut.util.algorithm.support; ckN(`W,xp
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import org.rut.util.algorithm.SortUtil; :F>L;mp
s.;KVy,=Bu
/** G^rh*cb K
* @author treeroot qH%L"J
* @since 2006-2-2 5u)^FIBj
* @version 1.0 {0vbC/?]
*/ V\K m% vP
public class HeapSort implements SortUtil.Sort{ ;D"P9b]9$
s$>m0^
/* (non-Javadoc) :+ 9Ft>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8U2wH
*/ ,eeL5V
public void sort(int[] data) { +%}5{lu_e
MaxHeap h=new MaxHeap(); CDW(qq-zD
h.init(data); EB2^]?
for(int i=0;i h.remove(); [wio/wc
System.arraycopy(h.queue,1,data,0,data.length); 3TiXYH
} 7 Mki?EG
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private static class MaxHeap{ 9[p}.9/
TXD^Do5^
void init(int[] data){ %*5g<5
this.queue=new int[data.length+1]; _"!{7e`Z
for(int i=0;i queue[++size]=data; (2S!$w%
fixUp(size); Gj7QGIKx
} =*:[(Py1
} W|H4i;u
s/G5wRl<
private int size=0; {`K]sa7`
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private int[] queue; S?nNZW\6[
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public int get() { z<[.MH`ln
return queue[1]; U.pr} hq
} @0UwI%.
2>MP:yY;K
public void remove() { Eo {1y
SortUtil.swap(queue,1,size--); Z;Ir>^<
fixDown(1); +<!)k?
} "`jZ(+
file://fixdown krr-ZiK
private void fixDown(int k) { mU?&\w=v$
int j; 3\p]esse
while ((j = k << 1) <= size) { p~,3A:i
if (j < size %26amp;%26amp; queue[j] j++; e1`)3-f
if (queue[k]>queue[j]) file://不用交换 +%e%UF@
break; h2/dhp
SortUtil.swap(queue,j,k); GwMUIevO_
k = j; .}$`+h8WT
} Y1yXB).AH8
} \}u7T[R=`
private void fixUp(int k) { Owh*KY:
while (k > 1) { igRDt{}
int j = k >> 1; ^i`3cCFB<
if (queue[j]>queue[k]) E2qB:
break; z6FbM^;;
SortUtil.swap(queue,j,k); {m+S{dWp
k = j; "]SJbuzh
} gQI(=in
} tv@Z5
*%Nns',
} c69U1
s=q%:uCO
} sxN>+v11z
c?p0#3%L#
SortUtil： uFrJ:l+
M5T=Fj86
package org.rut.util.algorithm; :\1rQT
2\nBqCxR
import org.rut.util.algorithm.support.BubbleSort; uGP[l`f|FQ
import org.rut.util.algorithm.support.HeapSort; 9LqMQv"xW
import org.rut.util.algorithm.support.ImprovedMergeSort; Ypn%[sSOp
import org.rut.util.algorithm.support.ImprovedQuickSort; >tmnj/=&
import org.rut.util.algorithm.support.InsertSort; S<y>Y
import org.rut.util.algorithm.support.MergeSort; (sV]UGrZ
import org.rut.util.algorithm.support.QuickSort; j#LV7@H.e?
import org.rut.util.algorithm.support.SelectionSort; D y`W5_xSz
import org.rut.util.algorithm.support.ShellSort; B7Ki@)
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/** 1*!c X
* @author treeroot dr,B\.|jC
* @since 2006-2-2 D% v:PYf
* @version 1.0 FhY{;-W(T
*/ ]Efh(Gb]
public class SortUtil { +?"HTDBE||
public final static int INSERT = 1; #|{BGVp
public final static int BUBBLE = 2; Q>}eIQ Y
public final static int SELECTION = 3; DqurHQ z)m
public final static int SHELL = 4; Ad}-I%Ie
public final static int QUICK = 5; fH#F"^A
public final static int IMPROVED_QUICK = 6; g)Vq5en*
public final static int MERGE = 7; "%.|n|
public final static int IMPROVED_MERGE = 8; SQdzEF
public final static int HEAP = 9; z`86-Ov
X\b}jo^96
public static void sort(int[] data) { a<57(Sf
sort(data, IMPROVED_QUICK); @MN}^umx`
} a gmeiJT
private static String[] name={ J+/}K>2#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vCy.CN$
}; lgCHGv2@
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private static Sort[] impl=new Sort[]{ Hl^aUp.c
new InsertSort(), P|unUW(P
new BubbleSort(), "xe7Dl
new SelectionSort(), 4cXAT9
new ShellSort(), b[J-ja.
new QuickSort(), Eonq'Re$
new ImprovedQuickSort(), G?Qe"4 .
new MergeSort(), L?3VyBE
new ImprovedMergeSort(), l]a^"4L4`o
new HeapSort() V9+xL 1U#
}; =Q/w%8G
W;3 R;
public static String toString(int algorithm){ Qag|nLoT
return name[algorithm-1]; ;x!,g5q"q
} Z-4K?;g'k
X;s3y{ku
public static void sort(int[] data, int algorithm) { )^jQkfL
impl[algorithm-1].sort(data); ~=`f]IL
} =,&u_>Dp
G]L0eV
public static interface Sort { jGk7=}nw
public void sort(int[] data); ^#a#<8Jz
} VRtbHam
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public static void swap(int[] data, int i, int j) { %-h7Z3YcN
int temp = data; S`pF7[%rp
data = data[j]; rtB|N-
data[j] = temp; 4'+d"Ok
} QE7+rBa
} 96.IuwL*.s