[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; {jD?obs
} ,t 2CQ
int i1=l; +c_AAMe
int i2=mid+1; s{dm,|?Jl,
for(int cur=l;cur<=r;cur++){ <pk*z9
if(i1==mid+1) [j@ek
data[cur]=temp[i2++]; A}Iyl
else if(i2>r) <lB2Nv-,
data[cur]=temp[i1++]; %uo8z~+
else if(temp[i1] data[cur]=temp[i1++]; j#f/M3
else OmuE l>
data[cur]=temp[i2++]; :Pq&l.
} c^=q(V
} 8 o}5QOW
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} U)kyq
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改进后的归并排序: 4>(K~v5;N
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package org.rut.util.algorithm.support; #m|el@)
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import org.rut.util.algorithm.SortUtil; Mzg'$]N
MNs<yQ9I'
/** ai;!Q%B#Q
* @author treeroot l]|&j`'O
* @since 2006-2-2 bpsyO>lx/
* @version 1.0 d*+}_EV)Y3
*/ "dCIg{j
public class ImprovedMergeSort implements SortUtil.Sort { b!g)/%C
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private static final int THRESHOLD = 10; >IQ&*Bb
#xmiUN,|
/* ?e-rwaW
* (non-Javadoc) SsX$l<t*
* 5tv*uz|fv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GYw/KT~$
*/ u|23M,
public void sort(int[] data) { KdR\a&[MA
int[] temp=new int[data.length]; O#igH
mergeSort(data,temp,0,data.length-1); ` .`:~_OE
} ]}SV%*{%
!& c%!*
private void mergeSort(int[] data, int[] temp, int l, int r) { > X AB#
int i, j, k; (NUXK
int mid = (l + r) / 2; f]1 $`
if (l == r) >kAJS??
return; 1%M^MT%&
if ((mid - l) >= THRESHOLD) leHKBu'd
mergeSort(data, temp, l, mid); IO#)r[JZ
else {$N\@q@v~
insertSort(data, l, mid - l + 1); <=uO*s>%
if ((r - mid) > THRESHOLD) ruqE]Hx9(
mergeSort(data, temp, mid + 1, r); JK)|a@BtOT
else j 1'H|4
insertSort(data, mid + 1, r - mid); NHZMH!=4:n
crd|r."
for (i = l; i <= mid; i++) { yYOV:3!"
temp = data; 6AD&%v
} VFV8ik)
for (j = 1; j <= r - mid; j++) { XXwIp-'
temp[r - j + 1] = data[j + mid]; sUF5Yq:9
} VII`qbxT
int a = temp[l]; P9\y~W
int b = temp[r]; qjfv9sU
for (i = l, j = r, k = l; k <= r; k++) { ^ &KH|qRrO
if (a < b) { y3*IF2G
data[k] = temp[i++]; fo}@B&=4
a = temp; DvEII'-h
} else { Wm8BhO
data[k] = temp[j--]; 3sBWtz
b = temp[j]; ^?%ThPo_
} <\:*cET3
} fR.raI4et
} nb5%a
rGH7S!\AM
/** 3I?yRE
* @param data !4F@ !.GG!
* @param l ;Xidv9c
* @param i d{!zJ+n
*/ -GgV&%'a
private void insertSort(int[] data, int start, int len) { oi3Ix7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pfim*\'
} dkEnc
} ]H:K$nmX
} i\36 s$\
} YVHDk7s
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堆排序： [t^%d9@t
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package org.rut.util.algorithm.support; }xrrHp
k!@/|]3z
import org.rut.util.algorithm.SortUtil; g2 V $
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/** HV3wUEI3
* @author treeroot %4To@#c
* @since 2006-2-2 0@f7`D
* @version 1.0 ,Ur~DXY
*/ {iq{<;)U?U
public class HeapSort implements SortUtil.Sort{ HSl$ U0
`.6Jgfu
/* (non-Javadoc) ,/L_9wV-\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1_W5@)
*/ Qe/=(P<
public void sort(int[] data) { Hi{!<e2
MaxHeap h=new MaxHeap(); hG'2(Y!
h.init(data); Z.LF5ur
for(int i=0;i h.remove(); S67T:ARS
System.arraycopy(h.queue,1,data,0,data.length); FHH2
} "ZVBn!
}\ui}\
private static class MaxHeap{ 5Q72.4HH
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void init(int[] data){ }Lwj~{
this.queue=new int[data.length+1]; **YNR:#Y
for(int i=0;i queue[++size]=data; RZE:WE;5
fixUp(size); Ah2XwFg?
} @p2dXJeR<
} =09j1:''<d
*DoEDw
private int size=0; J=]w$e ?.P
skP_us~
private int[] queue; .'AHIR&>
Y=rW.yK8
public int get() { )@`w^\E_~_
return queue[1]; m~NWY$oI9[
} *&2#;mf3
O,1u\Zy/
public void remove() { Mw5!9@Fc7
SortUtil.swap(queue,1,size--); E[Io8|QA
fixDown(1); %J%gXk}]
} :~)Q]G1Nj
file://fixdown RBgkC+2
private void fixDown(int k) { izWl5}+'B
int j; ;09J;sf
while ((j = k << 1) <= size) { |]\bgh
if (j < size %26amp;%26amp; queue[j] j++; +[}]a3)
if (queue[k]>queue[j]) file://不用交换 /~tfP
break; 6k3l/~R
SortUtil.swap(queue,j,k); fAUsJ[
k = j; '}YXpB
} K :q-[\G
} u#UeJuO
private void fixUp(int k) { et ~gO!1:*
while (k > 1) { quUJ%F
int j = k >> 1; ;qk~>
if (queue[j]>queue[k]) w./EJkKI
break; c`}X2u]k
SortUtil.swap(queue,j,k); zXf+ieo
k = j; =nL*/
} %Z5k8
} ?RzT0HRd
X9gC2iSs]
} Z "=(uwM
O.}gG6u5
} tB3CX\e
yaR;
SortUtil： V=*J9~K
-5 W0K}
package org.rut.util.algorithm; kL|Y-(FPo%
qRGb3l
import org.rut.util.algorithm.support.BubbleSort; C[&&.w8Pm
import org.rut.util.algorithm.support.HeapSort; v_@_J!s
import org.rut.util.algorithm.support.ImprovedMergeSort; 6uXYZ.A
import org.rut.util.algorithm.support.ImprovedQuickSort; S'JeA>L
import org.rut.util.algorithm.support.InsertSort; KE&}*Nf[
import org.rut.util.algorithm.support.MergeSort; qtH&]Suu,
import org.rut.util.algorithm.support.QuickSort; pz IMj_
import org.rut.util.algorithm.support.SelectionSort; yl 8v&e{
import org.rut.util.algorithm.support.ShellSort; 4F4u1r+
Y#Vy:x[
/** G\p; bUF
* @author treeroot rlIEch^wZ
* @since 2006-2-2 t3>rf3v
* @version 1.0 7h0'R k
*/ BD0-v`
public class SortUtil { fDqXM;a"
public final static int INSERT = 1; ,< icW&a
public final static int BUBBLE = 2; bgK(l d`
public final static int SELECTION = 3; rpT<cCem1
public final static int SHELL = 4; N]<gHGj}
public final static int QUICK = 5; XfrnM^oty
public final static int IMPROVED_QUICK = 6; _dBU6U:V
public final static int MERGE = 7; U ^9oc&
public final static int IMPROVED_MERGE = 8; S+y2eP G
public final static int HEAP = 9; =5M>\vt]
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public static void sort(int[] data) { G0Eq}MyF
sort(data, IMPROVED_QUICK); /a|NGh%
} 7 f*_
private static String[] name={ e`Yns$x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8)!;[G|
}; KRZV9AJ
U.F65KaKF
private static Sort[] impl=new Sort[]{ PK4UdT
new InsertSort(), NGY I%:
new BubbleSort(), qi2dTB
new SelectionSort(), iP%=Wo.
new ShellSort(), F]*-i 55S
new QuickSort(), 7&)F;;H
new ImprovedQuickSort(), k9xKaJ%1
new MergeSort(), cj<@~[uw
new ImprovedMergeSort(), gAY2|/,
new HeapSort() ^e,RM_.
}; i?/?{p$#a-
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public static String toString(int algorithm){ 9p4U\hx
return name[algorithm-1]; ex+AT;o
} 5Z,lWp2A
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public static void sort(int[] data, int algorithm) { @ 1A_eF
impl[algorithm-1].sort(data); q_&IZ,{Vk
} EvmmQ
1W[(+TZ&s
public static interface Sort { Q9>]@DrAx
public void sort(int[] data); Y%l3SB,5L
} ~Wm}M
5,ahKB8
public static void swap(int[] data, int i, int j) { l7!)#^`2_
int temp = data; 6{X>9hD
data = data[j]; .A/H+.H;
data[j] = temp; }2,#[mM
} 6S[D"Q94
} ^b %8_?2m