[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; 2VS#=i(B^
} :y[tZ&*<_?
int i1=l; p&;,$KDA
int i2=mid+1; *r]#jY4qx
for(int cur=l;cur<=r;cur++){ hn u/
if(i1==mid+1) rx;zd?
data[cur]=temp[i2++]; %|3UWN
else if(i2>r) )F35WP~
data[cur]=temp[i1++]; "mkTCR^]e
else if(temp[i1] data[cur]=temp[i1++]; \(ZOt.3!J
else DnPV Tp(>
data[cur]=temp[i2++]; D$c4's`5
} :YZMRJL
} ;rH@>VrR
mCx6$jz
} J&6]3x
V]9?9-r
改进后的归并排序: Zx]"2U#
_/!IjB:(70
package org.rut.util.algorithm.support; !xK`:[B
1cdM^k
import org.rut.util.algorithm.SortUtil; Z5o6RTi
]Z\.Vx
/** W7"ks(
* @author treeroot f/qG:yTV`
* @since 2006-2-2 zW^@\kB0D
* @version 1.0 #X"eg
*/ )y:~T\g
public class ImprovedMergeSort implements SortUtil.Sort { 6]^}GyM!
O(PG"c
private static final int THRESHOLD = 10; =6TD3k6(2
(v8jVbg
/* Y75,{1\l0
* (non-Javadoc) LdAfY0
* v}ZQC8wL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FXOA1VEg
*/ D[)g-_3f6<
public void sort(int[] data) { X&6p_Lo
int[] temp=new int[data.length]; Khxl'qj
mergeSort(data,temp,0,data.length-1); T?c:z?j_9
} |,Y(YSg.
[L,Tf_t^Y
private void mergeSort(int[] data, int[] temp, int l, int r) { Xb=9~7&,$
int i, j, k; (&FSoe/!['
int mid = (l + r) / 2; R;f!s/^)
if (l == r) `Q*L!/K+
return; [=-?n6
if ((mid - l) >= THRESHOLD) 4*_9Gl
mergeSort(data, temp, l, mid); /4]M*ls
else ZO+c-!%[(
insertSort(data, l, mid - l + 1); fNc3&=]]
if ((r - mid) > THRESHOLD) }}v;V*_V
mergeSort(data, temp, mid + 1, r); WLEjRx
else e@6<mir[4
insertSort(data, mid + 1, r - mid); /PAxPZf_
k#%BxT
for (i = l; i <= mid; i++) { aO?(ZL
temp = data; SqTO~zGC
} #m6 eG&a
for (j = 1; j <= r - mid; j++) { ao<@a{G
temp[r - j + 1] = data[j + mid]; ]%3o"|
} )W~w72j-
int a = temp[l]; *Y6BPFE*4
int b = temp[r]; G@anY=D\EB
for (i = l, j = r, k = l; k <= r; k++) { utC]GiR
if (a < b) { Aq}]{gfQ1
data[k] = temp[i++]; 4,T!zT6&
a = temp; %zyO}
} else { /+ vl({vV
data[k] = temp[j--]; `(<XdlOj
b = temp[j]; q-3%.<LL
} 3HC aZ?Ry'
} 6|t4\'
} q4PRc<\^
-@-cG\{
/** @!&\Z[",
* @param data c$Js<[1
* @param l J (Yfup
* @param i 5@bLDP
*/ B5aFt ;Vj
private void insertSort(int[] data, int start, int len) { 4r`u@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5zX;/n~
} 8*I43Jtlf,
} (Kd;l&8
} a;D{P`%n
} yv^j~
IL?3>$,
堆排序： 8E"Ik~
eyy{z;D8r
package org.rut.util.algorithm.support; ngj=w;7~+
e'mm42
import org.rut.util.algorithm.SortUtil; W~k"`g7uu
^[Cpu_]D
/** 2Otd
* @author treeroot }:7'C. ."
* @since 2006-2-2 >_(Xb%w
* @version 1.0 nVko]y
*/ ao#{N=mn
public class HeapSort implements SortUtil.Sort{ gEbe6!; q3
Wc ]BQn
/* (non-Javadoc) ifl`QZp_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \RyOexNZ
*/ #ok1qT9_
public void sort(int[] data) { l9"0Wu@_x
MaxHeap h=new MaxHeap(); b26#0;i
h.init(data); ~UX@%0%)N
for(int i=0;i h.remove(); P7O$*
System.arraycopy(h.queue,1,data,0,data.length); sxIvL7jl
} i-w^pv'
T_|%nF-+
private static class MaxHeap{ 2%i_SX[
IL`X}=L_
void init(int[] data){ R7}=k)U?d@
this.queue=new int[data.length+1]; 2jV.\C k
for(int i=0;i queue[++size]=data; {m~.'DU
fixUp(size); CRf!tsj@
} iZ %KHqG
} ;= ^kTb`X
GOuBNaU{
private int size=0; cih@:=Qy
u:AKp<'
private int[] queue; GTL gj'B
]Ir{9EE v
public int get() { nf=*KS\v
return queue[1]; ?=,4{(/)
} $Wt0e 4YSu
u UXj
public void remove() { Tlc3l}B*Z
SortUtil.swap(queue,1,size--); !=%0
fixDown(1); s+IU%y/9$a
} .XDY1~w0
file://fixdown yN}upYxp
private void fixDown(int k) { vU,AOK[l{
int j; C_xOk'091
while ((j = k << 1) <= size) { #yz5CWu
if (j < size %26amp;%26amp; queue[j] j++; 8axz`2`
if (queue[k]>queue[j]) file://不用交换 rP$vZ^/c
break; >SRUC
SortUtil.swap(queue,j,k); `q =e<$
k = j; n.9k<
} -+MGs]),
} s+#|j;V<
private void fixUp(int k) { \i1>/`F
while (k > 1) { Z{-x}${
int j = k >> 1; 8/q6vk><
if (queue[j]>queue[k]) nADt8
break; &XG k
SortUtil.swap(queue,j,k); x~1.;dBF
k = j; 9{&APxm
} P(iZGOKUs=
} yLv jfP1
MV8Lk/zd?A
} jvfVB'Tmr
w\(LG_n|
} IX/FKSuq
nT7{`aaQl
SortUtil： 3Ee8_(E\
VrG4wLpLs
package org.rut.util.algorithm; si`{>e~`6P
9{OH%bF
import org.rut.util.algorithm.support.BubbleSort; >y P`8Oq[
import org.rut.util.algorithm.support.HeapSort; PT2b^PP
import org.rut.util.algorithm.support.ImprovedMergeSort; [>`[1;aX
import org.rut.util.algorithm.support.ImprovedQuickSort; xL.T}f~y2>
import org.rut.util.algorithm.support.InsertSort; aFkxR\x 6%
import org.rut.util.algorithm.support.MergeSort; fwR3=:5~
import org.rut.util.algorithm.support.QuickSort; r 5$(
import org.rut.util.algorithm.support.SelectionSort; !83x,*O
import org.rut.util.algorithm.support.ShellSort; ]>utLi5dX
]U :1NC"
/** >v4k_JX
* @author treeroot .aRL'1xHl
* @since 2006-2-2 to0tH^pD
* @version 1.0 C=LXL1x2e
*/ 3YY<2<
public class SortUtil { 'pE %'8R
public final static int INSERT = 1; \L#BAB6z
public final static int BUBBLE = 2; `_2#t1`u
public final static int SELECTION = 3; X,- ' v[z
public final static int SHELL = 4; DdI7%?hK
public final static int QUICK = 5; "Y&+J@]
public final static int IMPROVED_QUICK = 6; Q*TxjE7K
public final static int MERGE = 7; 7R\!'`]\M
public final static int IMPROVED_MERGE = 8; ht^U VV2
public final static int HEAP = 9; C9-9cdW H
c$f|a$$b
public static void sort(int[] data) { -X#J<u T/
sort(data, IMPROVED_QUICK); $XS0:C0
} }@'xEx
private static String[] name={ v9~Hl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TJtW?c7
}; X$JO<@x
syh0E=If_
private static Sort[] impl=new Sort[]{ $"{V],:T |
new InsertSort(), ~H0~5v F
new BubbleSort(), :C42yQAP
new SelectionSort(), ;U<)$5
new ShellSort(), Zn3iLAPBX
new QuickSort(), e,E;\x &
new ImprovedQuickSort(), ej,MmLu~^
new MergeSort(), (2@b ,w^
new ImprovedMergeSort(), f/)3b`$Wu
new HeapSort() mxHNK4/
}; $2BRi@
%9mCgHQ9
public static String toString(int algorithm){ pb%#`2"
return name[algorithm-1]; ./<3jf :
} &3{:h
d$rJW m5H
public static void sort(int[] data, int algorithm) { mUy/lo'4
impl[algorithm-1].sort(data); $!I$*R&
} VhSKtD1
K=sQ_j.&Z
public static interface Sort { CjQ_oNI
public void sort(int[] data); svpWABO
} Lu:!vTRmw
aic6,>\!'
public static void swap(int[] data, int i, int j) { 6X|KKsPzX
int temp = data; Q\=u2}/z0
data = data[j]; KvilGh10
data[j] = temp; kq%`9,XE
} N83RsL "}_
} +G/~v`Bv