[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; b8Bf,&:ys
} ^t X}5i`P
int i1=l; [diUO1p
int i2=mid+1; ST'eJ5P7!5
for(int cur=l;cur<=r;cur++){ LmCr[9/
if(i1==mid+1) K+2sq+3q
data[cur]=temp[i2++]; J3 Y-d7=|
else if(i2>r) SQ$|s%)oB
data[cur]=temp[i1++]; t(d$v_*y51
else if(temp[i1] data[cur]=temp[i1++]; +OEheG8
else e u{
data[cur]=temp[i2++]; F?h{IH f
} H rMH
} _SVIY@K|/
qeM`z
} :9nqQJ+~
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改进后的归并排序: NOzAk%s3I
& B CA
package org.rut.util.algorithm.support; cD&QN9
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import org.rut.util.algorithm.SortUtil; )uG7 DR
|<:Owd=
/** S5%I+G3
* @author treeroot G0e]PMeFl
* @since 2006-2-2 KM'*+.I
* @version 1.0 7IEG%FY T
*/ nu=yE$BN{
public class ImprovedMergeSort implements SortUtil.Sort { moop.}O<
NA=I7I@
private static final int THRESHOLD = 10; "#ctT-g`6
F=T};b
/* !L|}/u3v
* (non-Javadoc) 7dg2-4
* B\<;e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JI)@h 4b
*/ 6jDHA3
public void sort(int[] data) { xAZ-_}'tW
int[] temp=new int[data.length]; T(@J]Y-
mergeSort(data,temp,0,data.length-1); \vKKq/f
} aAT!$0H
qD]&&"B
private void mergeSort(int[] data, int[] temp, int l, int r) { ?FV>[&-h#I
int i, j, k; _NwB7@ e
int mid = (l + r) / 2; b235Zm
if (l == r) d?9b6k?
return; 8.Z9 i
if ((mid - l) >= THRESHOLD) {S$]I)tV
mergeSort(data, temp, l, mid); Z)Zc9SVC
else `!um)4
insertSort(data, l, mid - l + 1); N4L#$\M
if ((r - mid) > THRESHOLD) =sIkA)"!=
mergeSort(data, temp, mid + 1, r); .%x1%TN
else lx)Bj6
insertSort(data, mid + 1, r - mid); >Q-"-X1
ge[hAI2I
for (i = l; i <= mid; i++) { uXm_ pQpF
temp = data; U3-cH
} }w|a^=HAp
for (j = 1; j <= r - mid; j++) { flXDGoW
temp[r - j + 1] = data[j + mid]; ';vLj1v
} 0W6jF5T
int a = temp[l]; .7`c(9<
int b = temp[r]; qhQeQ
for (i = l, j = r, k = l; k <= r; k++) { lx H3a :gm
if (a < b) { ^sP-6 ^
data[k] = temp[i++]; k^i\<@v
a = temp; {gkY:$xnrG
} else { yh'P17N|q
data[k] = temp[j--]; LJ{P93aq`^
b = temp[j]; jqJ't)N
} vIQu"J&fE
} U=vh_NHj
} voitdz
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/** !\hUjM+(}
* @param data Yp@i{$IUW
* @param l VX+:C(m~
* @param i Q|] 9
*/ C?h}n4\B^?
private void insertSort(int[] data, int start, int len) { 4COo~d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _9B ^@~
} 2t3DQ
} |qq7vx
} i9=*ls^Cx
} NN"!kuM
s+@`Z*B5
堆排序： rsPo~nA
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package org.rut.util.algorithm.support; k%TjRf{p
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import org.rut.util.algorithm.SortUtil; "b `R_gG9
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/** |<Rf^"T
* @author treeroot ;UPI%DnE]
* @since 2006-2-2 )W0z
* @version 1.0 cP,bob]
*/ NA-)7i*>J
public class HeapSort implements SortUtil.Sort{ %]\IC(q
;Svs|]d
/* (non-Javadoc) }0f"SWO>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cj3C%W
*/ F\BD7W
public void sort(int[] data) { d>k"#|
MaxHeap h=new MaxHeap(); t{g7 :A
h.init(data); WgayH
for(int i=0;i h.remove(); 12y+g5b
System.arraycopy(h.queue,1,data,0,data.length); tv\_& ({
} oJln"-M1nx
pe@j`Sm:Ej
private static class MaxHeap{ 5fuB((fd(
ITr@;@}c]
void init(int[] data){ rhQv,F9
this.queue=new int[data.length+1]; w^N3Ma
for(int i=0;i queue[++size]=data; ;Q8LA",5d
fixUp(size); E(/M?>t-
} x17K8De
} nAY'1!Oi
us$=)m~v+
private int size=0; l6z}D;4
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private int[] queue; F?*ko,
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public int get() { j _p|>f<}
return queue[1]; 9S! 2r
} V0/O T~gS8
Lcow2 SbH
public void remove() { >xK!J?!K
SortUtil.swap(queue,1,size--); s$PPJJT{b
fixDown(1); Yj#4{2A
} 2/4,iu(T`c
file://fixdown "79"SSfOc
private void fixDown(int k) { ^!yJ;'H\
int j; 8-uRn38
while ((j = k << 1) <= size) { wD|I^y;
if (j < size %26amp;%26amp; queue[j] j++; d^W1;0
if (queue[k]>queue[j]) file://不用交换 ml\2%07
break; VyWPg7}e
SortUtil.swap(queue,j,k); @teNT"
k = j; gK+/wTQ%
} D5gDVulsh
} '3eL^Aq
private void fixUp(int k) { 2Pz)vnV"
while (k > 1) { *CS2ndp
int j = k >> 1; jGaI6G'N
if (queue[j]>queue[k]) X\ bXat+
break; NpN-''B\
SortUtil.swap(queue,j,k); KE*8Y4#9
k = j; 6&KvT2?tA`
} 5ON\Ve_H
} sBV})8]KM
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} C<u<:4^H
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} 9fQFsI
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SortUtil： KCc7u8
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package org.rut.util.algorithm; \I[50eh|
e_Un:r@)
import org.rut.util.algorithm.support.BubbleSort; 8\])p sb9
import org.rut.util.algorithm.support.HeapSort; :,[=g$CT:
import org.rut.util.algorithm.support.ImprovedMergeSort; TOC2[mc'
import org.rut.util.algorithm.support.ImprovedQuickSort; 5kbbeO|0G
import org.rut.util.algorithm.support.InsertSort; `+?g96
import org.rut.util.algorithm.support.MergeSort; Htn''adg5
import org.rut.util.algorithm.support.QuickSort; fq,LXQ#G
import org.rut.util.algorithm.support.SelectionSort; bWEti}kW
import org.rut.util.algorithm.support.ShellSort; r< ~pSj
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/** [:*Jn}
* @author treeroot Ap)[;_9BD
* @since 2006-2-2 R m^$Dn
* @version 1.0 qOM"?av
*/ H68~5lJY^]
public class SortUtil { <)am]+Lswy
public final static int INSERT = 1; W3aFao>!OZ
public final static int BUBBLE = 2; BK;Gh0mp
public final static int SELECTION = 3; HJ^SqSm
public final static int SHELL = 4; TcEvUZJ"
public final static int QUICK = 5; !${7)=|=1
public final static int IMPROVED_QUICK = 6; XMpa87\
public final static int MERGE = 7; OJ!=xTU%h
public final static int IMPROVED_MERGE = 8; ^]{m*bEkR
public final static int HEAP = 9; BWG*UjP M
.,+TpPkc
public static void sort(int[] data) { [3|&!:4g6
sort(data, IMPROVED_QUICK); P~d&PhOe
} 8urX]#
private static String[] name={ J,SP1-L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aTLu7C\-e
}; SR8)4:aKW
Svqj@@_f
private static Sort[] impl=new Sort[]{ Ql8s7%
new InsertSort(), nkTpUbS'f?
new BubbleSort(), 734f&2
new SelectionSort(), ~OSgpM#O!T
new ShellSort(), oo4aw1d
new QuickSort(), %<]4]h
new ImprovedQuickSort(), qSA]61U&
new MergeSort(), Z`]r)z%f
new ImprovedMergeSort(), E>I\m!ue
new HeapSort() 1LZ[i89&%
}; ='G-wX&k
s{9G//
public static String toString(int algorithm){ K{EDmC
return name[algorithm-1]; dn1Fwy.
} ;Y9-0W
L'L[Vpx
public static void sort(int[] data, int algorithm) { uEui{_2$
impl[algorithm-1].sort(data); {3`cSm6c
} q/#pol
j@u]( nf
public static interface Sort { NpLZ ,|H
public void sort(int[] data); !*e1F9k
} cXod43
W7#dc89}
public static void swap(int[] data, int i, int j) { lW|`8ykp
int temp = data; c:I %jm
data = data[j]; g^: &Dh
data[j] = temp; of=N+ W
} \k 6'[ln
} b[KZJLZ)