[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; &"25a[x{B
} "y62Wo6m)
int i1=l; ]$Z aS\m
int i2=mid+1; P=V~/,>SZ!
for(int cur=l;cur<=r;cur++){ )<!y_;$A
if(i1==mid+1) 5z=;q!3
data[cur]=temp[i2++]; obY5taOw
else if(i2>r) MQLa+I,S4
data[cur]=temp[i1++]; ``0knr <
else if(temp[i1] data[cur]=temp[i1++]; XN??^1{J}]
else "S*lI^8Z!
data[cur]=temp[i2++]; @y)fR.!)1$
} F2lTDuk>C
} :Oy9`vv
v vOG]2z
} & [4Gv61
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改进后的归并排序: Un7jzAvQ
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package org.rut.util.algorithm.support; 1?Wk qQ
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import org.rut.util.algorithm.SortUtil; Q]66v$
3>c<E1
/** +Z/Pj_.o
* @author treeroot Pij*?qmeQ
* @since 2006-2-2 : 3*(kb1)&
* @version 1.0 tP7l ;EX4
*/ P>Pw;[b>O
public class ImprovedMergeSort implements SortUtil.Sort { ^!?W!k!:V
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private static final int THRESHOLD = 10; n:'Mpux
qVE6ROSh
/* 4IIe1 .{
* (non-Javadoc) OZDnU6
* e=Kf<ZQt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sBB>O@4
*/ FG'F]fc%
public void sort(int[] data) { r+d%*Dx
int[] temp=new int[data.length]; {rf.sN~M
mergeSort(data,temp,0,data.length-1); vm 1vX;
} "0pu_
6|~N5E~SX
private void mergeSort(int[] data, int[] temp, int l, int r) { FUiEayM
int i, j, k; 0LeR#l:I
int mid = (l + r) / 2; Z;-=xp
if (l == r) |*K AqTO0
return; w+z~Mz}Vz
if ((mid - l) >= THRESHOLD) Xu2:yf4No*
mergeSort(data, temp, l, mid); Hq ]f$Q6:
else +?DP r
insertSort(data, l, mid - l + 1); tp7cc;0
if ((r - mid) > THRESHOLD) vYcea
mergeSort(data, temp, mid + 1, r); NirG99kyo
else |W:xbtPNy
insertSort(data, mid + 1, r - mid); JPRo<jt=
ZvM~]8m
for (i = l; i <= mid; i++) { MV'q_{J
temp = data; h3[^uYe
} aHuZzYQ*"j
for (j = 1; j <= r - mid; j++) { bXmX@A$#Io
temp[r - j + 1] = data[j + mid]; a=]tqV_
} N7=lSBm
int a = temp[l]; k><k|P[|
int b = temp[r]; MZZEqsD5[
for (i = l, j = r, k = l; k <= r; k++) { l`>|XUf6
if (a < b) { (_Ph{IN
data[k] = temp[i++]; !?#B*JGFS
a = temp; CD]"Q1 t}
} else { bwG$\Oe6
data[k] = temp[j--]; PFq1Zai}n|
b = temp[j]; iGlg@
} R6v~Sy&n!
} ^T2o9f
} /g(WCKva
ps[HvV"
/** t<h[Lb%{T4
* @param data {DlQTgP
* @param l Qqm'Yom%T
* @param i Dc-v`jZ@)
*/ oG{0{%*@
private void insertSort(int[] data, int start, int len) { lC|`DG-B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ObnQ,x(
} (#KSwWo{ed
} (JenTL`%u
} rvfS[@>v
} 76epkiz;=
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堆排序： v'=$K[_
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package org.rut.util.algorithm.support; (qo ?e2K
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import org.rut.util.algorithm.SortUtil; !p #m?|Km
7n}$|h5D
/** lrQNl^K}=
* @author treeroot ?gYQE&M !
* @since 2006-2-2 *62Cf[a
* @version 1.0 EC;R^)
*/ \D67J239E
public class HeapSort implements SortUtil.Sort{ l5P!9P
<UsFBF
/* (non-Javadoc) 1zIX $A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )IBvm1
*/ S@4p.NMU
public void sort(int[] data) { IX+!+XC"U
MaxHeap h=new MaxHeap(); 8/gA]I 6=#
h.init(data); )@(IhU)
for(int i=0;i h.remove(); q8 &\;GK|
System.arraycopy(h.queue,1,data,0,data.length); pz4lC=H%o
} :#nfdvqm
r_>]yp
private static class MaxHeap{ T"IDCT'z
uSQlE=
void init(int[] data){ 8SGqDaRt
this.queue=new int[data.length+1]; |!m8JV|x
for(int i=0;i queue[++size]=data; kLE("I:7
fixUp(size); U\y:\+e l
} ly9tI-E
} ;}B6`v
e92,@
private int size=0; NdxPC~Z+
6K7DZ96L
private int[] queue; unvS`>)Np
K&4FFZ
public int get() { Wr+/9
return queue[1]; V |cPAT%
} :;Xh`br
zu_bno!
public void remove() { _9f7@@b
SortUtil.swap(queue,1,size--); yOTC>?p%
fixDown(1); TGDrTyI?y
} Yj"{aFK#u@
file://fixdown nixIKOnjC
private void fixDown(int k) { S\M+*:7
int j; KOhK#t>H@0
while ((j = k << 1) <= size) { awB+B8^s
if (j < size %26amp;%26amp; queue[j] j++; U%rEW[j
if (queue[k]>queue[j]) file://不用交换 lJvfgP-j
break; slnvrel
SortUtil.swap(queue,j,k); B%n|%g6K|h
k = j; B=}s7$^
} J.(mg D
} N(J'h$E
private void fixUp(int k) { 6w`.'5
while (k > 1) { ]!>tP,<`'
int j = k >> 1; H-iCaXT
if (queue[j]>queue[k]) {zIcEN$ ~
break; ##6u
SortUtil.swap(queue,j,k); Ak kth*p
k = j; tP1znJh>y
} }IRD!
} >PYc57S1c
}D]y-BbA.
} * ,Le--t
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} A'aYH`j
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SortUtil： Nt,:`o |
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package org.rut.util.algorithm; uCHM
a! 3eZ,
import org.rut.util.algorithm.support.BubbleSort; LGh#
import org.rut.util.algorithm.support.HeapSort; HDi_|{2^
import org.rut.util.algorithm.support.ImprovedMergeSort; SFjRSMi
import org.rut.util.algorithm.support.ImprovedQuickSort; f"-3'kqo
import org.rut.util.algorithm.support.InsertSort; GJ\bZ"vDo
import org.rut.util.algorithm.support.MergeSort; *+TO%{4
import org.rut.util.algorithm.support.QuickSort; Y)68
import org.rut.util.algorithm.support.SelectionSort; )YVs=0j
import org.rut.util.algorithm.support.ShellSort; $sFqMy
#AH gY.
/** (c S'Nm5
* @author treeroot p`Ok(C_
* @since 2006-2-2 r ?<?0j
* @version 1.0 fQxlYD'peb
*/ ]tNB^
public class SortUtil { LfvNO/:,
public final static int INSERT = 1; ,(B/R8ZF~
public final static int BUBBLE = 2; emHaZhh
public final static int SELECTION = 3; QL\3|'a
public final static int SHELL = 4; e7yn"kd
public final static int QUICK = 5; /Yj; '\3
public final static int IMPROVED_QUICK = 6; pS "A{k)i
public final static int MERGE = 7; *SYuq)
public final static int IMPROVED_MERGE = 8; Ip0`R+8
public final static int HEAP = 9; " 1h~P,
5Mp$u756
public static void sort(int[] data) { 0HI0/Tvu$<
sort(data, IMPROVED_QUICK); z s\N)LyM
} p^C$(}Yh
private static String[] name={ 7O~hA*Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .[ s6x5M
}; z $iI
bo#?,80L}`
private static Sort[] impl=new Sort[]{ &hEkm
new InsertSort(), JSoInR1E
new BubbleSort(), ikb;,Js
new SelectionSort(), p#N2K{E
new ShellSort(), Bxf&gDwjgr
new QuickSort(), IN@ =UAc&
new ImprovedQuickSort(), \;Sl5*kr
new MergeSort(), w&Z.rB?
new ImprovedMergeSort(), fskc'%x
new HeapSort() nj#kzD[n>
}; )&[ol9+\
r.' cjUs
public static String toString(int algorithm){ o,qUf
return name[algorithm-1]; K8uqLSP '
} LYuMR,7E
_6`H`zept
public static void sort(int[] data, int algorithm) { +.a->SZ5"
impl[algorithm-1].sort(data); *iUR1V Y
} ?s]?2>p
;y;UgwAM
public static interface Sort { M1eM^m8U
public void sort(int[] data); :m0pm@
} { 3Qlx/6<
g6H`uO
public static void swap(int[] data, int i, int j) { t; @T~%
int temp = data; Dc3bG@K*G
data = data[j]; @Ll^ze&HI
data[j] = temp; b~;M&Y
} {tuGkRY2~
} UAds$9