[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Y?q*hS0!H
} 2R~=@
int i1=l; 5}(YMsUb
int i2=mid+1; 9fk\Ay1P
for(int cur=l;cur<=r;cur++){ knj,[7uh
if(i1==mid+1) R _~m\P
data[cur]=temp[i2++]; YQw/[
else if(i2>r) `XRb:d^
data[cur]=temp[i1++]; KfN`ZZ<
else if(temp[i1] data[cur]=temp[i1++]; Yqj.z|}Nb
else mYU dhL^
data[cur]=temp[i2++]; [~&:`I1
} tue%L]hc
} bU@>1>b6lE
1+y6W1m^R
} ~P.-3
4h0jX9
改进后的归并排序: 88X*:Kf?:
)QJU]G
package org.rut.util.algorithm.support; }][|]/s?42
~N+/ZVo&y
import org.rut.util.algorithm.SortUtil; p{pzOMi6
}<x!95
/** H;"N|pBy
* @author treeroot #h|,GvmF<b
* @since 2006-2-2 WG!;,~f>o
* @version 1.0 Tef3 Z6
*/ _S7M5{U_
public class ImprovedMergeSort implements SortUtil.Sort { ` TVcI\W
j,V$vKP
private static final int THRESHOLD = 10; JCMEhI6d*
Z~.]ZWj-
/* E;+OD&|
* (non-Javadoc) MsVI <+JZ
* ?5+KHG*)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WSX@0A.&)
*/ z]R!l%`
public void sort(int[] data) { UEdl"FwM4
int[] temp=new int[data.length]; !n?*vN=S
mergeSort(data,temp,0,data.length-1); 77[;J
} K^1O =1gY
cbHn\m)J,
private void mergeSort(int[] data, int[] temp, int l, int r) { PX>\j&
int i, j, k; %A Du[M.
int mid = (l + r) / 2; Bo\dt@0;
if (l == r) R<YYf^y
return; '%r@D&*vp
if ((mid - l) >= THRESHOLD) 8 H"f9S=K
mergeSort(data, temp, l, mid); 0aN}zUf
else \(v_",
insertSort(data, l, mid - l + 1); DWevg;_]$(
if ((r - mid) > THRESHOLD) Gxt<kz
mergeSort(data, temp, mid + 1, r); nfPl#]ef*
else {UVm0AeUq
insertSort(data, mid + 1, r - mid); JnKbd~
GeW$lA I
for (i = l; i <= mid; i++) { ^# g;"K0
temp = data; d"$oV~>P|
} 9tW.}5V
for (j = 1; j <= r - mid; j++) { R)d7b,_Yd
temp[r - j + 1] = data[j + mid]; {w1h<;MH
} SbNUX
int a = temp[l]; @%B!$\]
int b = temp[r]; sV4tu(~
for (i = l, j = r, k = l; k <= r; k++) { 2/o/UfYjgF
if (a < b) { W;9X*I8f8
data[k] = temp[i++]; 'f<_SKd
a = temp; ,f""|X5
} else { [LEh
data[k] = temp[j--]; kIZdND&
b = temp[j]; 2*;Y%NcP[
} hx;kEJ
} #?d#s19s
} 0GR9C%"]
<("w'd}
/** s7cyo ]
* @param data wN0OAbtX'
* @param l zNTu j p
* @param i B*?PB]
*/ >+LgJo R
private void insertSort(int[] data, int start, int len) { wuCtg=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =id $
} 3B|-xq;]I
} cNB$g )`
} F!cAaL1
} +g7nM7,1a
%Yn)t3d
堆排序： >u[1v
$%"}N_M
package org.rut.util.algorithm.support; s !vROJ
wLp t2b8S
import org.rut.util.algorithm.SortUtil; Tsp-]-)
}EG(!)u
/** p5rRhu/|k3
* @author treeroot %YAiSSsV
* @since 2006-2-2 \@t5S
* @version 1.0 "$V2$
*/ -ZON']|<}k
public class HeapSort implements SortUtil.Sort{ a~TZ9yg+HL
A0k>Nb\c3
/* (non-Javadoc) g>-[-z$E3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *^5,7}9Qo
*/ xa*gQ%+F
public void sort(int[] data) { ^W05Z!}
MaxHeap h=new MaxHeap(); )GKgK;=~
h.init(data); `GWq3c5
for(int i=0;i h.remove(); >^ar$T;Ys
System.arraycopy(h.queue,1,data,0,data.length); R}26"+~
} qiryC7.E
D;n%sRq(Z
private static class MaxHeap{ 1iW9?=a"
>Ga1p'8FtU
void init(int[] data){ 9>>}-;$
this.queue=new int[data.length+1]; y5D?Bg|M
for(int i=0;i queue[++size]=data; +E[)@;T
fixUp(size); V-r<v1}M
} ~,1q :Kue
} )t=u(:u]
WYzaD}
private int size=0; fb;"J+
N6 8>`
private int[] queue; "kg$s5o
D*Q#G/TF3
public int get() { /8HO7E+5
return queue[1]; ~8{3Fc0
} bD-Em#>
<\EfG:e
public void remove() { GLF"`M/g
SortUtil.swap(queue,1,size--); GK%ovK
fixDown(1); *03/:q^(
} s@iCfXU
file://fixdown *?"{T;4u~O
private void fixDown(int k) { k|C8sSH
int j; 5z>\'a1U
while ((j = k << 1) <= size) { 28yxX431S
if (j < size %26amp;%26amp; queue[j] j++; AAY UXY!
if (queue[k]>queue[j]) file://不用交换 {\zr_v`g
break; 9iNns;^`q
SortUtil.swap(queue,j,k); F ;&e5G
k = j; u.FDe2|[)
} 3:#rFb
} r2'rfpQ
private void fixUp(int k) { n"Vd"}sU.
while (k > 1) { 9X` QlJ2|
int j = k >> 1; p00AcUTq
if (queue[j]>queue[k]) T+D]bfjr&&
break; <~+
SortUtil.swap(queue,j,k); Z$XpoDbOy
k = j; LS$82UB&
} y]9UFL"
} R |%
lHqx}n@e
} jy2nn:1#^
1iDo$]TEK
} Af<>O$$6
"6QMa,)D
SortUtil： d]`,}vi#E9
J,Ap9HJt
package org.rut.util.algorithm; @E;pT3; )
- S-1<xR
import org.rut.util.algorithm.support.BubbleSort; j #YFwX4.
import org.rut.util.algorithm.support.HeapSort; J@iN':l-
import org.rut.util.algorithm.support.ImprovedMergeSort; 3Q)>gh*
import org.rut.util.algorithm.support.ImprovedQuickSort; ;#j82
import org.rut.util.algorithm.support.InsertSort; ]l%.X7M9
import org.rut.util.algorithm.support.MergeSort; qQvb;jO
import org.rut.util.algorithm.support.QuickSort; -rlX<(pl)
import org.rut.util.algorithm.support.SelectionSort; Fo~v.+^?
import org.rut.util.algorithm.support.ShellSort; RkwY3s"
Y1\vt+`O
/** ]SgeZ07
* @author treeroot >6+K"J-@
* @since 2006-2-2 8l0 (6x$
* @version 1.0 "M &4c:cz
*/ BB$>h-M/%#
public class SortUtil { ,&G M\FTeb
public final static int INSERT = 1; eov-"SJB
public final static int BUBBLE = 2; -~fI|A^
public final static int SELECTION = 3; ~\,6C1M
public final static int SHELL = 4; _6 `4_<c=
public final static int QUICK = 5; yRkMR$5&
public final static int IMPROVED_QUICK = 6; QGy=JHb
public final static int MERGE = 7; Am4(WXVQ
public final static int IMPROVED_MERGE = 8; 2,0F8=L
public final static int HEAP = 9; (=rv `1
UUqj?'Nv
public static void sort(int[] data) { nDy=ZsK
sort(data, IMPROVED_QUICK); jF9CTL<
} YYW70k:
private static String[] name={ aM!#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G- WJlu
}; I_7EfAqg(
It-*CD9
private static Sort[] impl=new Sort[]{ q2vz#\A?
new InsertSort(), fM.|#eLi
new BubbleSort(), A!yLwkc:5
new SelectionSort(), ze)K-6SKH
new ShellSort(), {fD#=
new QuickSort(), 7gcG|kKT
new ImprovedQuickSort(), ze N!*VG
new MergeSort(), O]eJQ4XN<
new ImprovedMergeSort(), Mk?I}
new HeapSort() <Q)}
}; F-0PmO~3+W
or`stBx
public static String toString(int algorithm){ |'_<(z
return name[algorithm-1]; [rU8 #4.
} 89mre;v`
)n@3@NV
public static void sort(int[] data, int algorithm) { @un }&URp
impl[algorithm-1].sort(data); 2"mj=}y6
} Ms)zEy>[Ql
TVwYFX
public static interface Sort { vy2aNUmt
public void sort(int[] data); ZQA C&:
} 5&=n
m28w4
public static void swap(int[] data, int i, int j) { ?Nql7F4
int temp = data; FoCkTp+/
data = data[j]; U:hC!t:
data[j] = temp; " SqKS,J
} Y3>\;W*?
} #HYkzjb