[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&*: jDg
} 'b^l'KN:S
int i1=l; ~eP
int i2=mid+1; Nl@k*^
for(int cur=l;cur<=r;cur++){ WwuZ(>|
if(i1==mid+1) W9Nmx3ve
data[cur]=temp[i2++]; JqEW=5
else if(i2>r) u~W{RHClW
data[cur]=temp[i1++]; OifvUTl9b
else if(temp[i1] data[cur]=temp[i1++]; mN;+TN'?{
else iq?l#}]
data[cur]=temp[i2++]; eNRs&^
} !X|k"km"
} $X*mdji
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} 8tLHr@%%
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改进后的归并排序: ZK6Hvc0
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package org.rut.util.algorithm.support; ?aBj#
ak;6z]f8[
import org.rut.util.algorithm.SortUtil; n@!wp/J,
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/** Vtb1[cnna
* @author treeroot n`(~OO
* @since 2006-2-2 {Oj7
* @version 1.0 |uI?ySF
*/ jin db#)bz
public class ImprovedMergeSort implements SortUtil.Sort { igDG}q3jG
@%1IkvJV
private static final int THRESHOLD = 10; MRfb[p3Cx
;+ azeW^
/* 0VN7/=n|
* (non-Javadoc) zB*euHIqZ
* L@RIZu>ZW+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hN
*/ -v]Qhf&>
public void sort(int[] data) { y,E.SB
int[] temp=new int[data.length]; 5t\HJ`C1Z
mergeSort(data,temp,0,data.length-1); u%u&F^y
} _;hf<|c
h >-'-Hx+
private void mergeSort(int[] data, int[] temp, int l, int r) { |;+qld[4z
int i, j, k; a?F!,=F
int mid = (l + r) / 2; PU1,DU
if (l == r) oFCgu{\kt
return; _X4!xbP
if ((mid - l) >= THRESHOLD) {$d<1y^
mergeSort(data, temp, l, mid); y6-XHeU
else Q&CElx?L
insertSort(data, l, mid - l + 1); `'i( U7?
if ((r - mid) > THRESHOLD) h7]EB!D\A
mergeSort(data, temp, mid + 1, r); ? }yfKU`
else 7]Em,
insertSort(data, mid + 1, r - mid); yb2}_k.JG
bFY~oa%C
for (i = l; i <= mid; i++) { ba3*]01Yb
temp = data; LY 0]l$
} Y9Z]i$qS&k
for (j = 1; j <= r - mid; j++) { mM_ k^4:
temp[r - j + 1] = data[j + mid]; qnChM;)
} `zA#z />
int a = temp[l]; 1vnYogL
int b = temp[r]; , sjh^-;
for (i = l, j = r, k = l; k <= r; k++) { thc <xxRP
if (a < b) { _Mk7U@j+9
data[k] = temp[i++]; +D&Pp0xe
a = temp; }rq9I"/L
} else { ?Q0I'RC
data[k] = temp[j--]; KkcXNjPVS
b = temp[j]; *nC(-(r:J`
} zF`3gl.
} rf.`h{!!
} h!gk s-0
WBr59@V
/** :g6n,p_#
* @param data 8`=v.
* @param l s@8w-]"
* @param i -TO\'^][X
*/ t~``md4
private void insertSort(int[] data, int start, int len) { 3Fs5RC~a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PLX>-7@
} >yB(lKV
} GbI-SbE
} H1/?+N}(
} B07v^!Z>
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堆排序： r)^vO+3u
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package org.rut.util.algorithm.support; 15U(={
,ho3
import org.rut.util.algorithm.SortUtil; K/L;8a
t `kui.
/** g%nl!dgS
* @author treeroot h6~$/`&]b
* @since 2006-2-2 _n;;][]S
* @version 1.0 bQ'8SCe
*/ `=UWqb(K_
public class HeapSort implements SortUtil.Sort{ @-HG`c ct
pav'1d%
/* (non-Javadoc) mN|r)4{`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x/!5K|c
*/ gNYqAUG5
public void sort(int[] data) { UC HZ2&
MaxHeap h=new MaxHeap(); 3]RyTQ
h.init(data); q1?&Ev^
for(int i=0;i h.remove(); s{0aBeq
System.arraycopy(h.queue,1,data,0,data.length); 8NBT|N~N
} m3bCZ9iE
n_?tN\M
private static class MaxHeap{ 3"N)xO-
\xv;sl$f
void init(int[] data){ Fqy\CMC
this.queue=new int[data.length+1]; QnQOm""
for(int i=0;i queue[++size]=data; U;N:j8
fixUp(size); 8[vc?+>&
} @$9'@")
} F$BbYf2i
*/:uV B,b2
private int size=0; >-8cU_m7s
6;'dUGvH
private int[] queue; d?wc*N3
M(x$xAiD
public int get() { b~=0[Rv
return queue[1]; t>=fTkB
} &i+Ce
Rk!X]-`=
public void remove() { WOzf]3Xcj
SortUtil.swap(queue,1,size--); JjaoOe
fixDown(1); i4Lc$20?d
} ]^'@[<
file://fixdown [e[<p\]
private void fixDown(int k) { I9h ?;(
int j; H0m|1 7
while ((j = k << 1) <= size) { tW WWx~k
if (j < size %26amp;%26amp; queue[j] j++; y!tC20Q
if (queue[k]>queue[j]) file://不用交换 (T`E!A0I\?
break; yY?b.ty
SortUtil.swap(queue,j,k); Gx`Lks
k = j; }>)[<;M>%
} Bn@(zHG+5&
} C|pdv
private void fixUp(int k) { Xs: 3'ua
while (k > 1) { ^8.]d~j
int j = k >> 1; YIw1
if (queue[j]>queue[k]) ~ab:/!Z
break; T,aW8|
SortUtil.swap(queue,j,k); $9Hcdbdm
k = j; Po%LE]v,
} [sB 9gY(
} F*"}aP$
&f-Uyr7?
} }=c85f~i
AbZKYF P
} /|* Y2ETOr
y=?)n\f
SortUtil： ;>n,:355L
AGLscf.
package org.rut.util.algorithm; [w% qV 6
eek7=Z
import org.rut.util.algorithm.support.BubbleSort; |{CfWSB7~@
import org.rut.util.algorithm.support.HeapSort; 8Z(Mvq]f&
import org.rut.util.algorithm.support.ImprovedMergeSort; :q#Xq;Wp
import org.rut.util.algorithm.support.ImprovedQuickSort; :Nofp&
import org.rut.util.algorithm.support.InsertSort; phM>.y_
import org.rut.util.algorithm.support.MergeSort; |*}4 m'c
import org.rut.util.algorithm.support.QuickSort; BD(Z5+EU1
import org.rut.util.algorithm.support.SelectionSort; L4!{h|
import org.rut.util.algorithm.support.ShellSort; B95B|tU>.
/!c${W!sY
/** j4qJ.i
* @author treeroot Y "/]|'p
* @since 2006-2-2 hCC<?5q
* @version 1.0 +HBd %1
*/ 8F'x=lIO
public class SortUtil { '&\kxNglJ
public final static int INSERT = 1; h*-Pr8
public final static int BUBBLE = 2; z CvKDlL
public final static int SELECTION = 3; zux{S;:?
public final static int SHELL = 4; iyg*Xbmi~.
public final static int QUICK = 5; A!h`]%0B
public final static int IMPROVED_QUICK = 6; D8$G`~hD
public final static int MERGE = 7; @nux9MX<9
public final static int IMPROVED_MERGE = 8; v%q0OX>9X"
public final static int HEAP = 9; <yd{tD$A*
3\XU_Xs(]
public static void sort(int[] data) { *s:(jDlv
sort(data, IMPROVED_QUICK); r-Pkfy(
} %44leINx
private static String[] name={ UEguF&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ljb7oA3cP4
}; [PDNwh0g5
Q\ 0cvmU
private static Sort[] impl=new Sort[]{ #3gp6*R
new InsertSort(), 1,% R;7J=g
new BubbleSort(), {GQ^fu;q
new SelectionSort(), HhvdqvIEG
new ShellSort(), "vOwd.(?N
new QuickSort(), %^ !,t:d
new ImprovedQuickSort(), @0/+_2MH-
new MergeSort(), v_DedVhe
new ImprovedMergeSort(), YB2VcF.LU
new HeapSort() JsODzw
}; ^zQ/mo,Z
`Tv[DIVW
public static String toString(int algorithm){ "$YJX1u3
return name[algorithm-1]; |>dI/_'
} =w{Z@S(ukz
vkri+:S3
public static void sort(int[] data, int algorithm) { Zcx`SC-0
impl[algorithm-1].sort(data); e]zBf;9J
} )8$=C#qC[
^G}47(
public static interface Sort { rR(X9i
public void sort(int[] data); % ~H=sjg
} u)+8S/ )
~kEI4}O
public static void swap(int[] data, int i, int j) { uFinv2Z'
int temp = data; |R/%D%_g
data = data[j]; A;]}m8(*
data[j] = temp; 1=d6NX)B
} \D*KGd]M0
} Al}B34.uh