[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; e[*%tx H
} A!fRpN
int i1=l; y`p(}X`>
int i2=mid+1; <<[\ Rv
for(int cur=l;cur<=r;cur++){ Gjo&~*;
if(i1==mid+1) 8c0ugM
data[cur]=temp[i2++]; <;':'sW
else if(i2>r) V( SRw
data[cur]=temp[i1++]; (ixlFGvEq
else if(temp[i1] data[cur]=temp[i1++]; 6V6,m4e
else OysO55i
data[cur]=temp[i2++]; <CY<-H
} `w/b];e1)
} 7Hzv-s
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} +n&9ZCH
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改进后的归并排序: `} :~,E
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package org.rut.util.algorithm.support; (=/}i'
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import org.rut.util.algorithm.SortUtil; MgUjB~)Y
#>\%7b59>
/** 1QJB4|5R#
* @author treeroot Vf] ;hm
* @since 2006-2-2 ?N(opggiD
* @version 1.0 'NDDj0Y
*/ i.G"21M
public class ImprovedMergeSort implements SortUtil.Sort { P*.0kR1n
mr\C
private static final int THRESHOLD = 10; eL{6;.C
]Wdnr1d~8
/* %:/?eZ
* (non-Javadoc) j]bNOC2.L
* ~e#QAaXD#5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ki(
*/ ry!0~ir
public void sort(int[] data) { WDq~mi
int[] temp=new int[data.length]; z`KP }-
mergeSort(data,temp,0,data.length-1); G+zIh}9
} w~l%xiC
_W^{,*p
private void mergeSort(int[] data, int[] temp, int l, int r) { &JHqUVs^
int i, j, k; ;/=6~%
int mid = (l + r) / 2; wC~LZSTt
if (l == r) .U9A\$
return; p{S#>JTr
if ((mid - l) >= THRESHOLD) n06Jg+
mergeSort(data, temp, l, mid); 3~6,fTMz{
else 4VrL@c @
insertSort(data, l, mid - l + 1); Qa-~x8]
if ((r - mid) > THRESHOLD) #8;#)q_[u
mergeSort(data, temp, mid + 1, r); iDrQ4>
else Egr'IbB
insertSort(data, mid + 1, r - mid); g&`[r6B
(Q~(t
for (i = l; i <= mid; i++) { 6V^KOG
temp = data; WSV[)-=:
} I^itlQ
for (j = 1; j <= r - mid; j++) { zPt0IB_j'
temp[r - j + 1] = data[j + mid]; `6QQS3fk!
} gi5Ffvs$
int a = temp[l]; %;qDhAu0
int b = temp[r]; CyEEE2cV
for (i = l, j = r, k = l; k <= r; k++) { G;Thz
if (a < b) { ztHEXM.
data[k] = temp[i++]; 9_I#{?
a = temp; to"[r
} else { bdz&"\$X
data[k] = temp[j--]; %5|DdpES
b = temp[j]; rN5;W
} >$dkA\&p
} 5X=ik7m^
} ;gmfWHB<
nH -1,#`g
/** k=8LhO
* @param data t?404
* @param l U)y~{E~c34
* @param i c0M>CaKD
*/ k<cv80lhK
private void insertSort(int[] data, int start, int len) { aq<QKnU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1l`$.k
} b"QeCw#v`>
} 08JVX'X-mr
} 6h_OxO&!U
} \~ql_X;3
At=l>
堆排序： Owz.C_{)
jYi{[**
package org.rut.util.algorithm.support; p&4#9I5
`.8#q^
import org.rut.util.algorithm.SortUtil; KIfR4,=Q|
}2-p=Y:6
/** !ii'hwFm$
* @author treeroot Wy.Xx-3W
* @since 2006-2-2 #v QyECf
* @version 1.0 *)H&n>"e
*/ oy!Dm4F
public class HeapSort implements SortUtil.Sort{ RIQw+RG>
G oJ\6&"
/* (non-Javadoc) &?@5G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ap[}[:U
*/ baVSQtda
public void sort(int[] data) { G B&+EZ
MaxHeap h=new MaxHeap(); 61^5QHur
h.init(data); 6bW:&IPQ;
for(int i=0;i h.remove(); 2AZ)|dM'`
System.arraycopy(h.queue,1,data,0,data.length); SWGD(]}uz
} z}[qk:
}|7y.*
private static class MaxHeap{ >IzUn: 0F
4z##4^9g
void init(int[] data){ A/4HR]
this.queue=new int[data.length+1]; HRY?[+
for(int i=0;i queue[++size]=data; SdTJ?P+m
fixUp(size); [Nn ?:5"
} *4tJ|m6"Y6
} \|}dlG
URFp3qE
private int size=0; lV0\UySH
bf3Njma%
private int[] queue; 9(/ ;Wutj"
Pkbx/\
public int get() { ~KufSt*
return queue[1]; 7.o:(P1??g
} Hi 1@
i:ZL0nH-
public void remove() { Q/,bEDc&
SortUtil.swap(queue,1,size--); Q6G-`&5
fixDown(1); s2{d<0x?v
} ZO2$Aan
file://fixdown L.uX
private void fixDown(int k) { ORV~F0d<
int j; 9$z|kwU
while ((j = k << 1) <= size) { WUM&Lq k"
if (j < size %26amp;%26amp; queue[j] j++; oT4A|M
if (queue[k]>queue[j]) file://不用交换 k(oHmw
break; R`wL%I!?f
SortUtil.swap(queue,j,k); 3+_ .I{
k = j; "i\rhX
} `N_elf://n
} * ?a-m\
private void fixUp(int k) { g{zvks~it
while (k > 1) { vap,)kILF
int j = k >> 1; +ou ]|
if (queue[j]>queue[k]) 3TRzDE(J
break; iINd*eXb^
SortUtil.swap(queue,j,k); nVF?.c
k = j; UN <s1
} hlpi-oW`
} E|t. 3
bqHR~4 #IR
} ccc*"_45#
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} 8IYn9<L
O\h*?, )
SortUtil： HuPw?8w=
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package org.rut.util.algorithm; ZqhCGHy
Fb&Xy{kt1
import org.rut.util.algorithm.support.BubbleSort; g]IRv(gDh
import org.rut.util.algorithm.support.HeapSort; 8E:8iNbF
import org.rut.util.algorithm.support.ImprovedMergeSort; 2sj[hI
import org.rut.util.algorithm.support.ImprovedQuickSort; IJxBPwh
import org.rut.util.algorithm.support.InsertSort; *;QIAd
import org.rut.util.algorithm.support.MergeSort; L*xu<(>K
import org.rut.util.algorithm.support.QuickSort; Y40`~
import org.rut.util.algorithm.support.SelectionSort; (!72Eaw:]
import org.rut.util.algorithm.support.ShellSort; zW^_w&fd^j
B{UL(6\B
/** OOzk@j^
* @author treeroot {sn RS)-
* @since 2006-2-2 "~R,%sYb(
* @version 1.0 SG:Fn8
*/ \ 5MD1r}
public class SortUtil { KIY/nu
public final static int INSERT = 1; ObK-<kGcB
public final static int BUBBLE = 2; pKeK6K\8
public final static int SELECTION = 3; v2OK/W,0
public final static int SHELL = 4; :@mBSE/
public final static int QUICK = 5; 6n[O8^
public final static int IMPROVED_QUICK = 6; nitKX.t8
public final static int MERGE = 7; &J>XKO nl
public final static int IMPROVED_MERGE = 8; m<7Ax>
public final static int HEAP = 9; mGss9eZa
e70#"~gt[
public static void sort(int[] data) { )uj:k*`)
sort(data, IMPROVED_QUICK); %2H0JXKa,
} xEW>7}+\
private static String[] name={ D8Ntzsr6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O!uZykdX4!
}; MK"p~b0->
WJ%4IaT
private static Sort[] impl=new Sort[]{ .b.pyVk
new InsertSort(), |p4D!M+$7
new BubbleSort(), d@sAB1:
new SelectionSort(), &@g~o0
new ShellSort(), 4Ss4jUj
new QuickSort(), jXa;ovPK
new ImprovedQuickSort(), xIOYwVC
new MergeSort(), p"%K(NL
new ImprovedMergeSort(), HuVx^y` @
new HeapSort() y7f,]<%e_
}; 8i epG
@ Sq =q=S
public static String toString(int algorithm){ B^7B-RBi0
return name[algorithm-1]; 2p^Jqp`$
} [h5~1N
6_G[&
public static void sort(int[] data, int algorithm) { v&7yqEm}B
impl[algorithm-1].sort(data); Zqo
} g2Hz[C(
[8kufMY|
public static interface Sort { 0mt lM(
public void sort(int[] data); =d+~l
} "YC5viX
be<7Vy]j
public static void swap(int[] data, int i, int j) { 1{fu
int temp = data; !iNN6-v%
data = data[j]; DB=^Z%%Z
data[j] = temp; /v<FH}
} j1Ns|oph1
} 5WlBec@