[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; i>z_6Gax*[
} YI+ clh;%9
int i1=l; "&Hr)yyWG
int i2=mid+1; 37apOK4+
for(int cur=l;cur<=r;cur++){ "I)/|x\G*
if(i1==mid+1) V>Dqw!
data[cur]=temp[i2++]; ^h\(j*/#X
else if(i2>r) F m?j-'
data[cur]=temp[i1++]; b@QCdi,u
else if(temp[i1] data[cur]=temp[i1++]; <fHJ9(5$V
else mR["xDHD
data[cur]=temp[i2++]; ^'9.VVyz
} Cj%n?-
} %xt;&HE
Q,nJz*AJ
} +3uPHpMB-
[Ef6@
改进后的归并排序: QB uX#bDV
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package org.rut.util.algorithm.support; b?{MXJ|
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import org.rut.util.algorithm.SortUtil; cwuzi;f
>``sM=Wat
/** BG|m5f
* @author treeroot :FTx#cZ
* @since 2006-2-2 XHU\;TF
* @version 1.0 QC,fyw\
*/ (}g4}A@x
public class ImprovedMergeSort implements SortUtil.Sort { GY>G}bfh
O&dBLh!G
private static final int THRESHOLD = 10; GYZP?E p*
rp9?p%
/* 0$A^ .M;
* (non-Javadoc) Hf/ZaBn
* JDJ"D\85
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l1bkhA b
*/ Y~xo=v(
public void sort(int[] data) { lArKfs/
int[] temp=new int[data.length]; X[<%T}s#
mergeSort(data,temp,0,data.length-1); ho-#Xbq#g
} /KLkrW
* N]^(+/A
private void mergeSort(int[] data, int[] temp, int l, int r) { .k:heN2-x
int i, j, k; ">._&8KkE0
int mid = (l + r) / 2; 0iYo&q'n
if (l == r) _01wRsm%2
return; ;6eBfMhL
if ((mid - l) >= THRESHOLD) jme`Tyd
mergeSort(data, temp, l, mid); 0~~yYo&
else \q($8<
insertSort(data, l, mid - l + 1); {xAd>fGG+y
if ((r - mid) > THRESHOLD) vPz$+&{I
mergeSort(data, temp, mid + 1, r); y\omJx=,
else e2e!"kEF
insertSort(data, mid + 1, r - mid); oXjoQ
9X?RJ."J
for (i = l; i <= mid; i++) { +4$][3.
temp = data; @XJ#oxM^
} C}#$wge
for (j = 1; j <= r - mid; j++) { @ ]40xKF
temp[r - j + 1] = data[j + mid]; ;j.-6#n
} F\, vIS
int a = temp[l]; [~PR\qm
int b = temp[r]; Ur]/kij
for (i = l, j = r, k = l; k <= r; k++) { fy]c=:EmD
if (a < b) { lEgjv,
data[k] = temp[i++]; h@E7wp1'~
a = temp; c/Fgx/hr
} else { ;L,i">_%u[
data[k] = temp[j--]; (3Q$)0t
b = temp[j]; JK`$/l|7
} u^G Y7gah
} M^*\$K%
} e|?eY)_
2eHVl.C5
/** qu1+.z=|
* @param data =z;]FauR!
* @param l RL:B.Lv/W
* @param i O6/:J#X%
*/ ;yajt\a
private void insertSort(int[] data, int start, int len) { /oW]? 9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DK eB%k
} iO&*WIbg
} #i.,+Q
} U?an\rv
} r<'DS9m
#}Yrxf
堆排序： -#v1/L/=
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package org.rut.util.algorithm.support; J/fnSy
%&_^I*
import org.rut.util.algorithm.SortUtil; !zvjgDlZv
PtYG%/s
/** IITUM)
* @author treeroot 41R6V>e@9J
* @since 2006-2-2 ?"*JV1 9
* @version 1.0 9/!1J
*/ <#J5.I 1
public class HeapSort implements SortUtil.Sort{ OLPY<ax
$[}EV(#y
/* (non-Javadoc) F~i ~%f,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4(sHUWT
*/ JO`r)_
public void sort(int[] data) { J$sBfOD
MaxHeap h=new MaxHeap(); ~+j2a3rv-{
h.init(data); P3`$4p?
for(int i=0;i h.remove(); 0PqI^|!
System.arraycopy(h.queue,1,data,0,data.length); V y$*v
} 4e/!BGkAS
(8aj`> y
private static class MaxHeap{ J^`5L7CO
-uWV( ,|
void init(int[] data){ Xp_m=QQsm
this.queue=new int[data.length+1]; {g#4E0.A!
for(int i=0;i queue[++size]=data; H0#=oJr$)W
fixUp(size); ]iGeqwT
} ;1[Z&Uv8
} 8q%y(e
1cv~_jFh
private int size=0; F$(ak;v}
r8@]|`j
private int[] queue; g9q}D-
O>pv/Ns
public int get() { ^ZO! (
return queue[1]; Nf^<pT[*
} %s"&|32
C+uW]]~I)
public void remove() { *2u~5Kc<
SortUtil.swap(queue,1,size--); BGBHA"5fz
fixDown(1); mM72>1~L*
} PWyf3
file://fixdown ~x!up9
private void fixDown(int k) { A$r$g\5+
int j; D/f4kkd
while ((j = k << 1) <= size) { MW6z&+Z
if (j < size %26amp;%26amp; queue[j] j++; DrKB;6
if (queue[k]>queue[j]) file://不用交换 H)i|?3Ip
break; #H w(w
SortUtil.swap(queue,j,k); iX6>u4~(
k = j; Vn4wk>b}$2
} :u./"[G
} 7dcR@v`c
private void fixUp(int k) { *s*Y uY%y
while (k > 1) { ')!X1A{
int j = k >> 1; Oo@o$\+v
if (queue[j]>queue[k]) i4,p\rE0
break; BH1h2OEe#
SortUtil.swap(queue,j,k); w^ut,`yWR
k = j; !}z'"l4i
} Q8%_q"C
} ?T2>juf]5~
nV7Vc;
} o^vX\a?`u
E Izy
} Z.Yq)\it
A$3Rbn}"
SortUtil： 1'\QD`M9^
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package org.rut.util.algorithm; q9_$&9
1f}(=Hv{
import org.rut.util.algorithm.support.BubbleSort; uD>=
import org.rut.util.algorithm.support.HeapSort; qEr?4h
import org.rut.util.algorithm.support.ImprovedMergeSort; \O;2^
import org.rut.util.algorithm.support.ImprovedQuickSort; /W$i8g
import org.rut.util.algorithm.support.InsertSort; =&}_bd/]
import org.rut.util.algorithm.support.MergeSort; 3{$7tck,
import org.rut.util.algorithm.support.QuickSort; N o6!gZ1
import org.rut.util.algorithm.support.SelectionSort; d]]z )
import org.rut.util.algorithm.support.ShellSort; o]4\Geg$
OQ&N]P2p
/** ^"X.aksA
* @author treeroot U_(>eVi7F
* @since 2006-2-2 0SQr%:zG
* @version 1.0 >Ua'*
*/ Z-Qp9G'
public class SortUtil { 2Qp}f^
public final static int INSERT = 1; Mg.%&vH\
public final static int BUBBLE = 2; N!7}B
public final static int SELECTION = 3; iyl i/3|
public final static int SHELL = 4; hr}f5Z)^v
public final static int QUICK = 5; &7f8\TG|
public final static int IMPROVED_QUICK = 6; 80*hi)ux[
public final static int MERGE = 7; b&+zAt.
public final static int IMPROVED_MERGE = 8; Gv&G2^
public final static int HEAP = 9; w!7ApEH1
Sp80xV_B
public static void sort(int[] data) { (c(F1=K
sort(data, IMPROVED_QUICK); FKTF?4+\U
} ;"Kgg:K>W
private static String[] name={ 5,1<A@H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8x U*j
}; -!Myw&*\V
A/>Q5)
private static Sort[] impl=new Sort[]{ a)JXxst
new InsertSort(), g[O?wH-a
new BubbleSort(), ;Zd_2CZ
new SelectionSort(), N $) G8
new ShellSort(), #m.e9MU
new QuickSort(), v 49o$s4J
new ImprovedQuickSort(), F'Y ad
new MergeSort(), cRVL1ne
new ImprovedMergeSort(), C7FQc{
new HeapSort() y4Jc|)
}; Cy]=Y
js<d"m*
public static String toString(int algorithm){ @gD)pH
return name[algorithm-1]; dtC@cK/,D
} ~\_VWXXvIW
wQ/* f9
public static void sort(int[] data, int algorithm) { B-Jd|UE`u
impl[algorithm-1].sort(data); sgp.;h'
} F3}MM dX
{h?pvH_>
public static interface Sort { Af;Pl|Zh[
public void sort(int[] data); [Cl0Kw.LD
} ={O ~
:Z//
public static void swap(int[] data, int i, int j) { vmqa_gU\
int temp = data; @'R)$:I%L
data = data[j]; {Yj5Mj|#
data[j] = temp; m1X7zUCy
} &u.{]Yjx
} 'Rn-SD~gIr