[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; &m%Pr
} K+h9bI/Sf
int i1=l; (2O} B.6
int i2=mid+1; [/+dHW|
for(int cur=l;cur<=r;cur++){ #U!(I#^3
if(i1==mid+1) s_GK;;
data[cur]=temp[i2++]; BuEQ^[Ex
else if(i2>r) =XacG}_
data[cur]=temp[i1++]; ~x0-iBF
else if(temp[i1] data[cur]=temp[i1++]; 7/D9n9F
else _M"$5 T
data[cur]=temp[i2++]; 2#n$x*CY
} G>q{~HE1
} s!j(nUd/
80s~ae;
} /SPAJHh
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改进后的归并排序: (v'lb!j^#
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package org.rut.util.algorithm.support; 0'\FrG
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import org.rut.util.algorithm.SortUtil; PO%yWns30o
< o'7{
/** p+`*~6Jj/
* @author treeroot 0>~6Z
* @since 2006-2-2 _V7^sk!
* @version 1.0 PFDWC3<
*/ /SqFP L]
public class ImprovedMergeSort implements SortUtil.Sort { M|Dwk3#
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private static final int THRESHOLD = 10; S,`Sq8H
S\v&{
/* St3(1mApl
* (non-Javadoc) WkDn
* j6R{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6t7;}t]t
*/ >+; b>
public void sort(int[] data) { 4M0v1`k
int[] temp=new int[data.length]; ZB^4(F')H
mergeSort(data,temp,0,data.length-1); :E>n)_^
} zW"3K
'#4mDz~
private void mergeSort(int[] data, int[] temp, int l, int r) { QzFv;
int i, j, k; &Xl_sDvt
int mid = (l + r) / 2; r;%zGFp
if (l == r) /[0 /8f6
return; u'~b<@wHB
if ((mid - l) >= THRESHOLD) >uPde5"ZF-
mergeSort(data, temp, l, mid); J%Z)#
else SbPjU50
insertSort(data, l, mid - l + 1); IjB*myN.
if ((r - mid) > THRESHOLD) X,!OWz:[
mergeSort(data, temp, mid + 1, r); B'gk/^6$eg
else $MJDB
insertSort(data, mid + 1, r - mid); [^(R1K
>e$^#\D
for (i = l; i <= mid; i++) { h4B#T'b
temp = data; TNFm7}=
} F&L?J_=
for (j = 1; j <= r - mid; j++) { { Sliy'
temp[r - j + 1] = data[j + mid]; aD/,c1
} xZ @O"*{
int a = temp[l]; zIYr0k*%
int b = temp[r]; VU+s7L0
for (i = l, j = r, k = l; k <= r; k++) { -{:LxE
if (a < b) { Etr8lm E
data[k] = temp[i++]; S4:\`Lo-;
a = temp; {u_k\m[Y
} else { E]eqvTNH
data[k] = temp[j--]; %*Z2Gef?H
b = temp[j]; }PIGj}F/
} 9}qfdbI
} 9CU6o:'fW
} )V$!
}rMpp[
/** dI0>m:RBz
* @param data hA,rSq
* @param l XFf+efh
* @param i 0[!gk]p
*/ lRATrp#T
private void insertSort(int[] data, int start, int len) { ^SSOh#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CTbhwY(/
} Tk#&Ux{ZJ
} agxSb^ 8tF
} L^al1T
} H'h4@S
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堆排序： b{|/J<Fe
>/HU'
package org.rut.util.algorithm.support; p:Ld)U*
=|5bhwU]
import org.rut.util.algorithm.SortUtil; |3T|F3uEX
pffw5Tc
/** ZLio8
* @author treeroot MoR-8vnJ
* @since 2006-2-2 b}U&bFl
* @version 1.0 9Or4`JOO
*/ GwpBDMk
public class HeapSort implements SortUtil.Sort{ g d}TTe
9@z|2z2\G
/* (non-Javadoc) $?AUk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dZiWVa
*/ X3=Jp'p$h
public void sort(int[] data) { Lz>{FOR
MaxHeap h=new MaxHeap(); rNzhP*Fw
h.init(data); bb:|1D
for(int i=0;i h.remove(); `J,~hK
System.arraycopy(h.queue,1,data,0,data.length); /'=^^%&:B
} 89- 8v^ Pq
J!fc)h
private static class MaxHeap{ =#")G1A
19-yM`O
void init(int[] data){ &Cpxo9-
this.queue=new int[data.length+1]; -MW(={#
for(int i=0;i queue[++size]=data; Y./}zCT
fixUp(size); RdVis|7o
} K\E]X\:
} 4C9"Q,o%&
:8|3V~%m
private int size=0; *Qwhi&k
KRR^?
private int[] queue; |`;1p@w"
^sn>p}Tg
public int get() { "`gZy)E
return queue[1]; %b%<g%@i
} i~s9Ot
Hkz~9p
public void remove() { $HCAC4
SortUtil.swap(queue,1,size--); BaTOh'52
fixDown(1); `::'UfHc
} YM.IRj2/1
file://fixdown /R$x-7t)^(
private void fixDown(int k) { sS2E8Z2
int j; 7(USp#"
while ((j = k << 1) <= size) { d8 Nh0!
if (j < size %26amp;%26amp; queue[j] j++; O+Lb***b"
if (queue[k]>queue[j]) file://不用交换 5b4V/d* '
break; )qP{X,Uf
SortUtil.swap(queue,j,k); :!YJ3:\
k = j; I)%jPH:ua
} (5DGs_>
} #`)-$vUv^f
private void fixUp(int k) { ^8*SCM_A
while (k > 1) { nC{rs+P
int j = k >> 1; S9#N%{8P
if (queue[j]>queue[k]) [W;dguh
break; Csm!\I
SortUtil.swap(queue,j,k); z.Kq}r^
k = j; wp GnS
} Rf0\CEc
} DMZ aMY|
${6'
} !E#.WX
=RE_Urt:
} c7Qa !w
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SortUtil： XoiYtx53
/F}\V ^
package org.rut.util.algorithm; ?CZD^>6
8]MzOGB8
import org.rut.util.algorithm.support.BubbleSort; 2bxMIr
import org.rut.util.algorithm.support.HeapSort; H;Qn?^
import org.rut.util.algorithm.support.ImprovedMergeSort; q]%bd[zkz
import org.rut.util.algorithm.support.ImprovedQuickSort; QuRg(K%:
import org.rut.util.algorithm.support.InsertSort; ^(JbJ@m/
import org.rut.util.algorithm.support.MergeSort; Fj('l
import org.rut.util.algorithm.support.QuickSort; jz7ltoP
import org.rut.util.algorithm.support.SelectionSort; <Jrb"H[T"
import org.rut.util.algorithm.support.ShellSort; W3/Stt$D
U5$DJ5>8
/** sP8&p*TJF
* @author treeroot yrNc[kS/
* @since 2006-2-2 Ns= b&Uyc
* @version 1.0 [ .uaO
*/ vFC=qLz:
public class SortUtil { M`fXH 3D
public final static int INSERT = 1; Cj9O[
public final static int BUBBLE = 2; iT9Ex9RL
public final static int SELECTION = 3; (Tb0PzA
public final static int SHELL = 4; @,`=~_J
public final static int QUICK = 5; n}'.6
public final static int IMPROVED_QUICK = 6; ]hVXFHrR
public final static int MERGE = 7; ;/3/R/^g
public final static int IMPROVED_MERGE = 8; gOmyFHv.
public final static int HEAP = 9; I>o; %}
|(v=1#i
public static void sort(int[] data) { TZyQOjUu
sort(data, IMPROVED_QUICK); XJ/kB8
} rw0lXs#K<E
private static String[] name={ aDv/kFfn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -mw\?\2{
}; q&6=oss!
&B0&183
private static Sort[] impl=new Sort[]{ oYErG],
new InsertSort(), Xq!tXJ)
new BubbleSort(), "$cT*}br
new SelectionSort(), 24/~gft
new ShellSort(), 6="&K_Q7
new QuickSort(), b<78K5'
new ImprovedQuickSort(), gO!h<1!
new MergeSort(), je3n'^m
new ImprovedMergeSort(), <7] Y\{+
new HeapSort() |aJ6363f.
}; N;pr:
7[0k5-
public static String toString(int algorithm){ [E1|jcmQ
return name[algorithm-1]; Jxw:Jk ~
} U (7P X`1
2Lgvy/uN
public static void sort(int[] data, int algorithm) { arL&^]JnZ,
impl[algorithm-1].sort(data); G6VHl:e7z
} (w B[ ]O$@
U(LR('-h
public static interface Sort { |L{dQ)-'l
public void sort(int[] data); =e{KtX.
} &'\+Z
6YGr"Kj &
public static void swap(int[] data, int i, int j) { gF5EtdN?|
int temp = data; V46[whL%r
data = data[j]; !sQ8,l0h
data[j] = temp; EZRZ)h
} K -1~K
} \ySc uT