[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; " OtLJ
} "w1jr 6"
int i1=l; H*IoJL6
int i2=mid+1; .=S{
for(int cur=l;cur<=r;cur++){ )vzT\dQ|
if(i1==mid+1) O;"%z*g.
data[cur]=temp[i2++]; qB`P7!VN^]
else if(i2>r) i"@?eq#h
data[cur]=temp[i1++]; z/=v@@tj
else if(temp[i1] data[cur]=temp[i1++]; !h\3cs`QU
else 0Jrk(k!
data[cur]=temp[i2++]; J4; ".Y=
} >LSA?dy!?
} L2%P
DTY=k
} DJ.Ct4
g(Nf.hko
改进后的归并排序: ^4:= b
|v&&%>A2
package org.rut.util.algorithm.support; )Ec;krb+
s+11) ~
import org.rut.util.algorithm.SortUtil; @ ri.r1
Fk:(%ci
/** ] $*cmk(Y
* @author treeroot &0`L;1R
* @since 2006-2-2 h2]Od(^[
* @version 1.0 ub%q<sE*
*/ @lI/g
public class ImprovedMergeSort implements SortUtil.Sort { ORTM[cL
MDpXth7
private static final int THRESHOLD = 10; VTdZ&%@
?{V[bm
/* :H{8j}"
* (non-Javadoc) $) $sApB
* #S5vX<"9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qeYr=%)c
*/ 1/HZY0em
public void sort(int[] data) { ZmDr$iU~
int[] temp=new int[data.length]; f!yxS?j3
mergeSort(data,temp,0,data.length-1); CT : ac64
} )mU)7@!
6Jm4?ex
private void mergeSort(int[] data, int[] temp, int l, int r) { f]4gDmn^
int i, j, k; E=E
int mid = (l + r) / 2; /T@lHxX
if (l == r) d=pq+
return; sC j3h
if ((mid - l) >= THRESHOLD) T&%>/7I>
mergeSort(data, temp, l, mid); -T>`PJpJuL
else Z.<B>MD8^
insertSort(data, l, mid - l + 1); MX34qJ9k
if ((r - mid) > THRESHOLD) H>B:jJf
mergeSort(data, temp, mid + 1, r); sXUM,h8$!+
else -mXEbsm
insertSort(data, mid + 1, r - mid); %`~8j H@
1JM~Ls%Z
for (i = l; i <= mid; i++) { Y9u2:y!LdL
temp = data; r|(Lb'k
} -4;u|0_
for (j = 1; j <= r - mid; j++) { ~(c<ioIf
temp[r - j + 1] = data[j + mid]; "o1/gV
} & 3gni4@@
int a = temp[l]; zy.Ok 49
int b = temp[r]; "^\4xI
for (i = l, j = r, k = l; k <= r; k++) { )}R0'QGd
if (a < b) { 6Yklaq5
data[k] = temp[i++]; wo/H:3^N
a = temp; `is6\RH
} else { !tVV +vT#
data[k] = temp[j--]; 7]Z*]GRX
b = temp[j]; 4-o$OI>
} @!-= :<h
} k~H-:@
} /{lls2ycW%
]ba<4:[Go
/** NXV%j},>
* @param data 79Iz,_
* @param l Eb*DP_
* @param i C][`Dk\D{
*/ eI@O9<.&
private void insertSort(int[] data, int start, int len) { A;kB"Tx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I|:*Dy,~
} <J- aq;p
} 9QpKB c
} N%0Z> G
} 9i"3R0HN
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堆排序： -n6C~Yx
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package org.rut.util.algorithm.support; EV9m\'=j
>IRo]-,
import org.rut.util.algorithm.SortUtil; YpiSH(70`
pDu~84!])
/** %K zURv
* @author treeroot 5K8\hoW{
* @since 2006-2-2 Si;e_a
* @version 1.0 zdY`c
*/ +q3W t|
public class HeapSort implements SortUtil.Sort{ ).-FuL4Y
fx*Swv%r
/* (non-Javadoc) 7JujU.&{6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /q]WV^H
*/ $jm'uDvm
public void sort(int[] data) { A/'G.H
MaxHeap h=new MaxHeap(); 1@/+ c
h.init(data); bo]k9FC
for(int i=0;i h.remove(); X[VQ 1
System.arraycopy(h.queue,1,data,0,data.length); __zsrIUJ
} 1j}o.0\
<Wl! Qog'
private static class MaxHeap{ k(s3~S2h
7UMsKE-
void init(int[] data){ iJ~pX\FKO
this.queue=new int[data.length+1]; GU=h2LSi]
for(int i=0;i queue[++size]=data; 1aSuRa
fixUp(size); ~Su>^T(?-
} $BG9<:p
} pt<84CP
#x'C
private int size=0; xe 6x!
_I2AJn`#
private int[] queue; uu(.,11`
"3Ec0U \s
public int get() { 0evG
return queue[1]; m(9E{;
} L-Z1Xs
q+SDJ?v
public void remove() { ?L|@{RS{|
SortUtil.swap(queue,1,size--); 7^S&g.A
fixDown(1); H>M0GL
} y1P?A]v
file://fixdown !]W6i]p
private void fixDown(int k) { (!;4Y82#
int j; wjY3:S~
while ((j = k << 1) <= size) { <;=X7l+
if (j < size %26amp;%26amp; queue[j] j++; X\M0Q%8
if (queue[k]>queue[j]) file://不用交换 #B54p@.}
break; F> ..eK
SortUtil.swap(queue,j,k); WWD\EDnS
k = j; rGx1>xd(k
} sjztT<{Q^-
} t@b';Cuv
private void fixUp(int k) { #*?a"
while (k > 1) { ~B/|#o2
int j = k >> 1; TMGZHOAt
if (queue[j]>queue[k]) Dj?95Z,r
break; T"3WB o
SortUtil.swap(queue,j,k); ;5oY)1
k = j; +>{{91mN
} D_'Zucq
} B>gC75
^lbOv}C*
} F)!B%4
Yr"G)i~"Y
} {n{ j*+
Lk`0z
SortUtil： M7UVL&_z%
P oC*>R8
package org.rut.util.algorithm; @eR>?.:&
GN(PH/fO9
import org.rut.util.algorithm.support.BubbleSort; )R,*>-OPJL
import org.rut.util.algorithm.support.HeapSort; H!HkXm"
import org.rut.util.algorithm.support.ImprovedMergeSort; tXwnK[~x
import org.rut.util.algorithm.support.ImprovedQuickSort; 4_)@Nq
import org.rut.util.algorithm.support.InsertSort; vcqL
import org.rut.util.algorithm.support.MergeSort; Gh|q[s*k
import org.rut.util.algorithm.support.QuickSort; "c=\?
import org.rut.util.algorithm.support.SelectionSort; pl'n 0L<l
import org.rut.util.algorithm.support.ShellSort; ?2QssfB
k'EP->r
/** dfO84Z} 5
* @author treeroot 8q}`4wCD$
* @since 2006-2-2 L/#^&*'B
* @version 1.0 Ig*!0(v5$
*/ N(6|TE2
public class SortUtil { L~CwL
public final static int INSERT = 1; p e |k}{
public final static int BUBBLE = 2; { +MqXeq
public final static int SELECTION = 3; t d-EB&i\
public final static int SHELL = 4; }D{y u+)
public final static int QUICK = 5; ~O&3OL:L
public final static int IMPROVED_QUICK = 6; `+{|k)2B
public final static int MERGE = 7; 02SFFqm
public final static int IMPROVED_MERGE = 8; |'Z6M];8t
public final static int HEAP = 9; mQ:lj$Gf
_.yBX\tf[
public static void sort(int[] data) { t@.M;b8
sort(data, IMPROVED_QUICK); _T)dmhG
} U_B"B;ng+
private static String[] name={ I~gU3(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >a5CW~Z]
}; Sc`W'q^X
+'x|VPY.PG
private static Sort[] impl=new Sort[]{ #'_i6
new InsertSort(), grp1nWAs
new BubbleSort(), oX8e}
new SelectionSort(), o&-q.;MY
new ShellSort(), XSkx<"U*
new QuickSort(), t,)`Zu$
new ImprovedQuickSort(), ,=.&
new MergeSort(), R*VJe+5w
new ImprovedMergeSort(), c>,|[zP{
new HeapSort() BRhAL1
}; $i7iv
gk1I1)p
public static String toString(int algorithm){ DfXXN
return name[algorithm-1]; Rbm"Qz
} [yJcM [p\
.q"`)PT
public static void sort(int[] data, int algorithm) { %lF}!
impl[algorithm-1].sort(data); *$0uAN
} g/'CX}g`
^0Cr-
public static interface Sort { aq@/sMn
public void sort(int[] data); n3da@ClBt
} 'P3CgpF<Z2
I&,gCZ#
public static void swap(int[] data, int i, int j) { * _)xlpy
int temp = data; Tky\W%Ag
data = data[j]; ep>*]'
data[j] = temp; 7`9J.L&,;
} R/VrBiw
} }`FC'!(