[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; g"-j/ c
} =EJ&=t
int i1=l; ]7HR U6$
int i2=mid+1; s:T%,xS
for(int cur=l;cur<=r;cur++){ (,Y[2_Zv
if(i1==mid+1) -&/?&{Q0
data[cur]=temp[i2++]; (i&+=+"wn
else if(i2>r) "x,lL
data[cur]=temp[i1++]; YvY|\2^K
else if(temp[i1] data[cur]=temp[i1++]; =z1Lim-
else QV|6"4\
data[cur]=temp[i2++]; JPI%{@Qc^
} DV5hTw0
} Q'<AV1<
bZowc {!\
} *xnZTj:
N[{rsUBd
改进后的归并排序: F`D$bE;|
h:Pfiw]
package org.rut.util.algorithm.support; N/a4Gl(
*C*J1JYp+
import org.rut.util.algorithm.SortUtil; DB}Uzw|
y0%@^^-Ru
/** } z'Jsy[s
* @author treeroot [LVXXjkFI
* @since 2006-2-2 |$WHw*F^
* @version 1.0 j0l,1=^>l
*/ 1?'4%>kp
public class ImprovedMergeSort implements SortUtil.Sort { -P]O t>%S
i/>k_mG$d
private static final int THRESHOLD = 10; hh;kBv07o
o"z()w~
/* u>>|ZPe
* (non-Javadoc) 4D65VgVDM
* 1*O|[W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tm%5:/<8
*/ -`]9o3E7H
public void sort(int[] data) { kowS| c#
int[] temp=new int[data.length]; <\229
mergeSort(data,temp,0,data.length-1); )%C.IZ_s2
} . ,|C>^
A 3 V
private void mergeSort(int[] data, int[] temp, int l, int r) { C:Ef6ZW
int i, j, k; {;$oC4
int mid = (l + r) / 2; jz!I +
if (l == r) GQ(Y#HSq
return; jCqz^5=$
if ((mid - l) >= THRESHOLD) teok*'b:
mergeSort(data, temp, l, mid); J/]%zwDwS
else H/a gt
insertSort(data, l, mid - l + 1); eMGJx"a
if ((r - mid) > THRESHOLD) z}vT8qoX
mergeSort(data, temp, mid + 1, r); 6wlLE5
else W8W7<ml0A
insertSort(data, mid + 1, r - mid); >a"J);p
()lgd7|+
for (i = l; i <= mid; i++) { EjP;P}_iK
temp = data; 6,t6~Uo/
} & SXw=;B
for (j = 1; j <= r - mid; j++) { rm-d),Zt
temp[r - j + 1] = data[j + mid]; M=,pn+}y>
} %&L13:
int a = temp[l]; b++r#Q g
int b = temp[r]; ,_V V;P
for (i = l, j = r, k = l; k <= r; k++) { C'#KTp4!1
if (a < b) { 0["93n}r
data[k] = temp[i++]; 9#DXA}
a = temp; Xi="gxp$%
} else { yZlT#^$\
data[k] = temp[j--]; Nd0tR3gi7
b = temp[j]; Nm)3
} 6Zi{gx
} juEPUsE
} KjGu !B
]B/>=t"E
/** _H$Lu4b)N
* @param data hjL;B'IL
* @param l hBU)gP75
* @param i w=GMQ8
*/ 'z} t= ?
private void insertSort(int[] data, int start, int len) { 5]O{tSj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gWj-@o\
} O:?3B!wF
} ;yNc7Vl
} 7xnj\9$m
} ZTR9e\F
N R c4*zQJ
堆排序： _=g&^_ #t
9evr!=":
package org.rut.util.algorithm.support; (3n "a'
7(@xk_Pl
import org.rut.util.algorithm.SortUtil; yTZev|ej@
|))NjM'ZBl
/** Lc!2'Do;
* @author treeroot }nrjA0WN
* @since 2006-2-2 |=;hQ2HyF
* @version 1.0 PVb[E03
*/ 0F[f%2j
public class HeapSort implements SortUtil.Sort{ Cm[}DB
e:O,$R#g
/* (non-Javadoc) 3)G~ud
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wfo,r 7
*/ Xs2}n^#i
public void sort(int[] data) { oSCaP,P
MaxHeap h=new MaxHeap(); Sa g)}6+
h.init(data); v3r3$(Hr
for(int i=0;i h.remove(); ?V6,>e_+
System.arraycopy(h.queue,1,data,0,data.length); #E]K*mE'
} zQ,rw[C"W
R4p Pt
private static class MaxHeap{ ]-gyXE1.r
z0[@O)Sj
void init(int[] data){ ggDT5hb
this.queue=new int[data.length+1]; J&8KIOz14Z
for(int i=0;i queue[++size]=data; -,8LL@_
fixUp(size); 5`^@k<
} a=2.Y?
} Vk{;g
zYzV!s2^
private int size=0; P j
C|ZPnm>f30
private int[] queue; RU)(|;
wn"}<ka
public int get() { "BQnP9
return queue[1]; nCYkUDnZ
} C8m9H8Qm
b,'O|s]"Sc
public void remove() { 01A{\O1$j
SortUtil.swap(queue,1,size--); 6H|1IrG
fixDown(1); >jt2vU@t.
} SwOW%o
file://fixdown k8D_
private void fixDown(int k) { K1@Pt}
int j; </[.1&S+\
while ((j = k << 1) <= size) { rUI?{CV
if (j < size %26amp;%26amp; queue[j] j++; /3,/j)`a
if (queue[k]>queue[j]) file://不用交换 ovKM;cRs/
break; ABCm2$<
SortUtil.swap(queue,j,k); jR%*,IeB
k = j; gG?@_ie
} 7P1Pk?pxy
} PYCN3s#Gi
private void fixUp(int k) { sh :$J[
while (k > 1) { M=iTwK
int j = k >> 1; @j|E"VYY
if (queue[j]>queue[k]) c_>Gl8J
break; U}w'/:H
SortUtil.swap(queue,j,k); .\ Ijq!
k = j; =UKxf
} \0)jWCK
} vhBW1/w&F
G^.N$wcv
} DhE-g<
b1C)@gl!Z
} [lzd'
jrp>Y:
SortUtil： #Y=^4U`
Mq\=pxC@
package org.rut.util.algorithm; +4 k=Y
x*1wsA
import org.rut.util.algorithm.support.BubbleSort; z$Jm1l
import org.rut.util.algorithm.support.HeapSort; YY;<y%:8Z
import org.rut.util.algorithm.support.ImprovedMergeSort; FCt<h/
import org.rut.util.algorithm.support.ImprovedQuickSort; DP{nvsF
import org.rut.util.algorithm.support.InsertSort; ` @QZK0Ox
import org.rut.util.algorithm.support.MergeSort; e?W ,D0h
import org.rut.util.algorithm.support.QuickSort; M`Q$-#E:
import org.rut.util.algorithm.support.SelectionSort; <Z^by;d|z
import org.rut.util.algorithm.support.ShellSort; |0[Buh[_:c
~$y"Ldrp
/** AQ)gj$ m3
* @author treeroot 6=f)3!=
* @since 2006-2-2 `\( ?^]WLa
* @version 1.0 cO J`^^P
*/ d6MWgg
public class SortUtil { :-RB< Lj
public final static int INSERT = 1; !+SL=xy!{
public final static int BUBBLE = 2; 70qEqNoC
public final static int SELECTION = 3; 72, m c
public final static int SHELL = 4; _V"0g=&Hc
public final static int QUICK = 5; <&\ng^Z$
public final static int IMPROVED_QUICK = 6; JK2{9#*
public final static int MERGE = 7; c,@Vz 7c
public final static int IMPROVED_MERGE = 8; ]^ R':YE
public final static int HEAP = 9; uU^DYgs
y-hTTd"{
public static void sort(int[] data) { >M#@vIo?<6
sort(data, IMPROVED_QUICK); iM!2m$'s
} &qbEF3p^@
private static String[] name={ |S!RQ-CF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ):K%
}; !FgZI4?/Y=
v.]{b8RR
private static Sort[] impl=new Sort[]{ k-ZO/yPo
new InsertSort(), ,-6Oma -
new BubbleSort(), :|bL2T@>[
new SelectionSort(), vm@V5oH
new ShellSort(), YYT;a$GTo
new QuickSort(), M86"J:\u]
new ImprovedQuickSort(), p)SW(pS
new MergeSort(), mOJdx-q?r
new ImprovedMergeSort(), BeUyt
new HeapSort() ~9]vd|
}; }#m9Q[
vaeQ}F
public static String toString(int algorithm){ -@XSDfy7S
return name[algorithm-1]; |[rn/
} _%CM<z e
Z1,rN#p9
public static void sort(int[] data, int algorithm) { nL?P/ \
impl[algorithm-1].sort(data); Z=&|__+d
} [KA^+n
|"}rdOV)
public static interface Sort { iDDJJ>F26
public void sort(int[] data); sRt7.fe
} TJv .T2|
`"=Hk@E
public static void swap(int[] data, int i, int j) { %6q82}#`
int temp = data; ejd_ 85$
data = data[j]; $2uC%er"H
data[j] = temp; myj/93p}`b
} 20}HTV{v
} >*EZZ\eU!