[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; 1=;QWb6
} HQ s)T
int i1=l; Z@[,"{Sn
int i2=mid+1; __ mtZ{
for(int cur=l;cur<=r;cur++){ !%u#J:z2
if(i1==mid+1) 9#iDrZW
data[cur]=temp[i2++]; <{) 4gvH
else if(i2>r) 4]B3C\ v
data[cur]=temp[i1++]; ^mum5j
else if(temp[i1] data[cur]=temp[i1++]; R$fna[Xw@/
else *2AQ'%U~
data[cur]=temp[i2++]; R82Y&s;
} pt4xUu{
} poeXi\e!(
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} zJnVO$A'
}=|ZEhtOp
改进后的归并排序: KvD$`"L/CT
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package org.rut.util.algorithm.support; (t]>=p%4g
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import org.rut.util.algorithm.SortUtil; *n*y!z
r\ %O$zu
/** 9#(QS+q~
* @author treeroot [*vN`AfE
* @since 2006-2-2 Hxl,U>za#
* @version 1.0 T8441qo{>
*/ <dN=d3S
public class ImprovedMergeSort implements SortUtil.Sort { AfEEYP)N
+zD'r5
private static final int THRESHOLD = 10; {6n \532@
A$F;fCV*
/* ^97ZH)Ww
* (non-Javadoc) \Zv =?\
* dI!/:x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) btF%}<o)
*/ _Y|kX2l S@
public void sort(int[] data) { cik@QN<[0
int[] temp=new int[data.length]; GiZ'IDV
mergeSort(data,temp,0,data.length-1); !p&'so^-W
} "<2bjy
h(8;7}K
private void mergeSort(int[] data, int[] temp, int l, int r) { z`5I1#PVA
int i, j, k; (7b_g6>:
int mid = (l + r) / 2; ]-'9|N*}l
if (l == r) spx;QLo
return; 2SJh6U
if ((mid - l) >= THRESHOLD) %^l&fM*
mergeSort(data, temp, l, mid); u}1vn}F{
else )/Xrhhx
insertSort(data, l, mid - l + 1); \!QF9dP4
if ((r - mid) > THRESHOLD) =Yj[MVn
mergeSort(data, temp, mid + 1, r); z{g<y^Im+E
else I7PWOd
insertSort(data, mid + 1, r - mid); 5tU"|10m3
5)zB/Ta<
for (i = l; i <= mid; i++) { nTU~M~gky
temp = data; H ZLOn
} (d;(FBk='
for (j = 1; j <= r - mid; j++) { iy82QNe
temp[r - j + 1] = data[j + mid]; 3=l-jGJk
} B%@!\D#
int a = temp[l]; t60/f&A#7H
int b = temp[r]; +7/*y}.U
for (i = l, j = r, k = l; k <= r; k++) { `Y\/US70{c
if (a < b) { Hm*vKFhz
data[k] = temp[i++]; L||yQH7n
a = temp; ZY!pw6R1>*
} else { 02^(z6K'&?
data[k] = temp[j--]; <u?hdwW\
b = temp[j]; \.1b\\
} Gr@{p"./z
} c2\vG
} )Zf}V0!?+
N#)VD\m
/** G`#gV"PlC
* @param data :3>yr5a7-
* @param l L[G\+
* @param i 5SL>q`t.bd
*/ tN3 {7'\7
private void insertSort(int[] data, int start, int len) { wmr%h q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b2=Q~=Wc
} +Jka:]MW!
} px>>]>ZMH
} lq8ko@
} /eRtj:9M
C)96/k
堆排序： i>Bi&azx
6&QTVdK'O
package org.rut.util.algorithm.support; 2Ml2Ue-9
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import org.rut.util.algorithm.SortUtil; ,okJ eZ
.&x?`pER
/** -mHhB(Td'
* @author treeroot [a)~Dui0@\
* @since 2006-2-2 /Tf*d>Yh;
* @version 1.0 ptcLJ]+)
*/ 8*#][wC2
public class HeapSort implements SortUtil.Sort{ f76|
6>BDA?
/* (non-Javadoc) kw^Dp[8X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @!a]qAt
*/ D^s0EW-E
public void sort(int[] data) { ;]ShC\1
MaxHeap h=new MaxHeap(); ;~:Ryl M
h.init(data); q AVfbcb
for(int i=0;i h.remove(); O?,i?
System.arraycopy(h.queue,1,data,0,data.length); ) .-(-6=R
} Bb[0\Hs7
lcT+$4zk.
private static class MaxHeap{ :$cSQ(q9a
a H|OA\<
void init(int[] data){ K@sP~('
this.queue=new int[data.length+1]; KvJP(!{
for(int i=0;i queue[++size]=data; )]b@eGNGj
fixUp(size); K# i*9sM
} )~blx+\y
} ):fu
{.D2ON
private int size=0; 8cBW] \ v
%c&Ah
private int[] queue; )|h;J4V
<,X+`m&
public int get() { ]b~2Dap
return queue[1]; YaVc9du7
} B mBzOk^
/yw\(|T
public void remove() { 8@W/43K8-
SortUtil.swap(queue,1,size--); dI ZTLb"a
fixDown(1); C3b0`|5
} GE~(N N
file://fixdown E2h;hr;W
private void fixDown(int k) { WQLHjGehe
int j; t2-nCRXEP
while ((j = k << 1) <= size) { }M9DqZ;I
if (j < size %26amp;%26amp; queue[j] j++; Nzi/3r7m
if (queue[k]>queue[j]) file://不用交换 R3{*v =ov
break; [mB(GL
SortUtil.swap(queue,j,k); rxgVT4
k = j; tY$ty0y-e
} X|1_0
} Xk&F4BJQk<
private void fixUp(int k) { /romTK4
while (k > 1) { jRdhLs,M9
int j = k >> 1; f0mH|tI`
if (queue[j]>queue[k]) +ptF-
break; ;+ Co!L
SortUtil.swap(queue,j,k); IQlw 914
k = j; 3dxnh,]&@
} yrE,,N%I
} F'UguC">
Dmm r]~
} fs3-rXoB
tgvpf/cQ
} bco[L@6G$
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SortUtil： 0(hv#C4
orQV'
package org.rut.util.algorithm; 17n+4J]
*t?~)o7
import org.rut.util.algorithm.support.BubbleSort; J+cAS/MYX
import org.rut.util.algorithm.support.HeapSort; {Ukc D+.Y
import org.rut.util.algorithm.support.ImprovedMergeSort; }[KDE{,V
import org.rut.util.algorithm.support.ImprovedQuickSort; yYG3/Z3u5
import org.rut.util.algorithm.support.InsertSort; A1|7(Sow
import org.rut.util.algorithm.support.MergeSort; A^4kYOe
import org.rut.util.algorithm.support.QuickSort; 0x]OF8=J
import org.rut.util.algorithm.support.SelectionSort; ~D-JZx
import org.rut.util.algorithm.support.ShellSort; fNAo$O4cm
PV]k3&y
/** w`.T/
* @author treeroot y=oVUsG
* @since 2006-2-2 (N*<\6kr
* @version 1.0 BS-:dyBw
*/ ! =\DC,-CB
public class SortUtil { re ]Ste
public final static int INSERT = 1; _d\u!giy
public final static int BUBBLE = 2; C"U[ b%
public final static int SELECTION = 3; s0\f9D
public final static int SHELL = 4; n{.*El>{
public final static int QUICK = 5; W?"2;](
public final static int IMPROVED_QUICK = 6; Msv*}^>
public final static int MERGE = 7; /jZaU`
public final static int IMPROVED_MERGE = 8; yUD_w
public final static int HEAP = 9; ~}7$uW0ol
}DDVGs[
public static void sort(int[] data) { 2xL!PR-
sort(data, IMPROVED_QUICK); :_o] F
} _uO!N(k.
private static String[] name={ B8cBQv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )]c]el@y
}; >/!7i3Ow-
f%Z;05
private static Sort[] impl=new Sort[]{ L@1,7@
new InsertSort(), J$6-c'8
new BubbleSort(), JVUZ}#O
new SelectionSort(), P0'e"\$
new ShellSort(), H})Dcg3
new QuickSort(), i14[3bPLk!
new ImprovedQuickSort(), VjA wn}eO
new MergeSort(), 7d|*postv
new ImprovedMergeSort(), x9x#'H3
new HeapSort() .])>A')r
}; SE,o7_k'S
.0nn0)"
public static String toString(int algorithm){ OYszW]UMg
return name[algorithm-1]; iA55yT+
} )(:+q(m
4|zdXS
public static void sort(int[] data, int algorithm) { L;1$xI8tx
impl[algorithm-1].sort(data); u%6Irdx
} Z/89&Uy`h
[K/O5_
public static interface Sort { NCowt|#t
public void sort(int[] data); YVQ_tCC_!
} la G$v-r
RLYU\@kK?
public static void swap(int[] data, int i, int j) { 18DTv6?QG
int temp = data; M>*0r<qn
data = data[j]; 5cyddlaat
data[j] = temp; Fb<n0[m
} Lv `#zgo_f
} 2-vJv+-