[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; QOX'ZAB`
} <&^[?FdAa
int i1=l; Im?/#tX
int i2=mid+1; k8\KCKql
for(int cur=l;cur<=r;cur++){ PR/>E60H
if(i1==mid+1) '>ASr]Q
data[cur]=temp[i2++]; /d+v4GIB
else if(i2>r) |}2/:f#Iz*
data[cur]=temp[i1++]; kbL7Xjk
else if(temp[i1] data[cur]=temp[i1++]; deQ{
else b# Dd
data[cur]=temp[i2++]; pIV|hb!G
} <FX]n<
} rK3KxG
.sc80i4
} ^W(ue]j}o
[,MaAB
改进后的归并排序: YZ]}l%e
g&S>Wq%L
package org.rut.util.algorithm.support; LGw-cX #
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import org.rut.util.algorithm.SortUtil; )Tieef*Q~
k.7!)jL7
/** VDro(?p8Z
* @author treeroot *<:6A&'D9
* @since 2006-2-2 /0cm7[a?
* @version 1.0 <)pPq+
*/ ^rs{1S
public class ImprovedMergeSort implements SortUtil.Sort { |)v}\-\#
mU(v9Jpf7
private static final int THRESHOLD = 10; rizjH+
]#[4eaCg
/* |)xWQ KzA
* (non-Javadoc) E2 FnC}#W
* o~9sO=-O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7IFZK\V
*/ wpp!H<')
public void sort(int[] data) { Y}xM&%
int[] temp=new int[data.length]; 7NT0]j(w-
mergeSort(data,temp,0,data.length-1); \[qxOZ{
} {\`y)k 7
e$teh` p3
private void mergeSort(int[] data, int[] temp, int l, int r) { DE7y\oO]
int i, j, k; AOkG.u-k
int mid = (l + r) / 2; TV0sxod6
if (l == r) T{2)d]Y
return; !Pz#czo
if ((mid - l) >= THRESHOLD) FGPqF;
mergeSort(data, temp, l, mid); #6 ni~d&0
else $IS!GS&:
insertSort(data, l, mid - l + 1); C~ A`h=A<
if ((r - mid) > THRESHOLD) }D+ b`,
mergeSort(data, temp, mid + 1, r); s?s,wdp
else $9j>oUG
insertSort(data, mid + 1, r - mid); |Xm$O1Wa
S,C c0)j>
for (i = l; i <= mid; i++) { ,}khu
temp = data; 3Z`"k2k
} -T;^T1
for (j = 1; j <= r - mid; j++) { #?+[|RS|
temp[r - j + 1] = data[j + mid]; FZ}^)u}o
} K2e68GU
int a = temp[l]; 4DDBf j
int b = temp[r]; E|>-7k")
for (i = l, j = r, k = l; k <= r; k++) { NV-l9
if (a < b) { WO{7/h</
data[k] = temp[i++]; pouXt-%2X
a = temp; q.<)0nk
} else { /P-#y@I
data[k] = temp[j--]; 9D &vxKE
b = temp[j]; *59|
} r7].48D
} cl1ygpf(
} vE8BB$D
oH&@F@r:+
/** eub}+~_?[
* @param data [mQ1r*[j
* @param l si)>:e
* @param i Nd"IW${Kg
*/ *!TQC6b$
private void insertSort(int[] data, int start, int len) { @%*2\8}C!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !s^XWsb8
} z. X hE \
} M9o/6
} fzw:[z:%
} X`EVjK
bM5V=b_H
堆排序： k0N>J8y
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package org.rut.util.algorithm.support; ?%su?L
xo?'L&%
import org.rut.util.algorithm.SortUtil; V=5S=7 Z:
cr<j<#(Z}
/** Y3~z#<
* @author treeroot uYWgNNxdmo
* @since 2006-2-2 }y+Qj6dP
* @version 1.0 ZA. SX|m
*/ 1ig*Xp[
public class HeapSort implements SortUtil.Sort{ oJ*,a
`L 1+j
/* (non-Javadoc) N8df1>mW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R&6@*Nn
*/ $M4Z_zle)
public void sort(int[] data) { ybsw{[X>M
MaxHeap h=new MaxHeap(); %7 yQ0'P
h.init(data); ,u^{zYoW
for(int i=0;i h.remove(); rv(N0p/
System.arraycopy(h.queue,1,data,0,data.length); aem gGw<
} R`DzVBLl
kr~n5WiAZ
private static class MaxHeap{ boCi*]
R4VX*qkB
void init(int[] data){ 5@r6'Z
this.queue=new int[data.length+1]; u-y?i`
for(int i=0;i queue[++size]=data; ,SNrcwv
fixUp(size); Ipq0 1 +
} )`{m |\b
} xM!9$v
!4D?X\~"%
private int size=0; %XeN_ V
.)+c01
private int[] queue; {4A,&pR
gED|2%BXb
public int get() { G/FDD{y
return queue[1]; uq-`1m}
} CJCxL\
WkE="E}
public void remove() { Li|~%E1
SortUtil.swap(queue,1,size--); ZzgzeT+bv
fixDown(1); {DKZ~
} )-1e}VF(U
file://fixdown YLTg(*
private void fixDown(int k) { T%&vq6
int j; zj] g^c;
while ((j = k << 1) <= size) { f OR9N/
if (j < size %26amp;%26amp; queue[j] j++; u&c%L0)E&
if (queue[k]>queue[j]) file://不用交换 jQ'g'c!
break; T(Q ~b
SortUtil.swap(queue,j,k); dmXfz D
k = j; wT- <#+L\
} =H23eOS_#
} J ;z`bk^
private void fixUp(int k) { l3ogMRq@
while (k > 1) { Kw;gQk~R!
int j = k >> 1; u6?9#L(
if (queue[j]>queue[k]) *S.FM.r
break; 8@LWg d
SortUtil.swap(queue,j,k); x:~XZX\mwH
k = j; Rvu5#_P
} %Rf9KQ
} =^rp= Az
$V`1<>4
} csLbzDg
1Dc6v57
} KMkD6g
RD)Vb$.B:
SortUtil： u0arJU_.)
CUG"2K9
package org.rut.util.algorithm; /bo=,%wJ[
b\H&E{Gn|x
import org.rut.util.algorithm.support.BubbleSort; 0AffD:
import org.rut.util.algorithm.support.HeapSort; "5k6FV
import org.rut.util.algorithm.support.ImprovedMergeSort; G%l')e)9Gq
import org.rut.util.algorithm.support.ImprovedQuickSort; v!ai_d^
import org.rut.util.algorithm.support.InsertSort; fU ;H
import org.rut.util.algorithm.support.MergeSort; c CDT27@
import org.rut.util.algorithm.support.QuickSort; |5dNJF8;Q
import org.rut.util.algorithm.support.SelectionSort; 6Y\TVRR
import org.rut.util.algorithm.support.ShellSort; @{fwM;me]P
oz.z>+Q
/** bcy
* @author treeroot v'?o#_La+
* @since 2006-2-2 U7jDm>I
* @version 1.0 o[ks-C>jw
*/ k*6"!J%A
public class SortUtil { v@GhwL
public final static int INSERT = 1; -(WRhBpw
public final static int BUBBLE = 2; 'v0rnIsI?
public final static int SELECTION = 3; }PBL
public final static int SHELL = 4; $'5rS$]a/
public final static int QUICK = 5; ;a@riPqx!
public final static int IMPROVED_QUICK = 6; >lqo73gM9
public final static int MERGE = 7; RV{%@1Pu
public final static int IMPROVED_MERGE = 8; c-(dm:
public final static int HEAP = 9; H<fi,"X^
# }}6JM
public static void sort(int[] data) { r^msJ|k8[
sort(data, IMPROVED_QUICK); Hc>yZ:c;
} @|t]9
private static String[] name={ w0j'>4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ag+B*
}; UcB&pt&
"\}h
private static Sort[] impl=new Sort[]{ CEw%_U@8
new InsertSort(), .),9qz`
new BubbleSort(), #prYZcHv:_
new SelectionSort(), .5s58Hcg,
new ShellSort(), D]"W|.6@
new QuickSort(), Da8gOZ
new ImprovedQuickSort(), Xp06sl7 M
new MergeSort(), ic!% }S?
new ImprovedMergeSort(), 4[kyzz x
new HeapSort() N;-%:nC
}; o^(I+<el
uK(]@H7~!c
public static String toString(int algorithm){ n CX{tqy
return name[algorithm-1]; eXnSH$uI
} $,/E"G`
wy:Gy9\
public static void sort(int[] data, int algorithm) { '-N5F
impl[algorithm-1].sort(data); H?Sv6W.~
} <>f;g"qS
O:rfDO
public static interface Sort { {j`8XWLZZN
public void sort(int[] data); L;M@]
} s1::\&`za
)i:*r8*~
public static void swap(int[] data, int i, int j) { O#[bNLV
int temp = data; | Z7j s"
data = data[j]; :5j+^/
data[j] = temp; ZQKo ]Kdr
} JM/\n4ea:
} &0bq3JGW