[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; LwpO_/qV
} DKd:tL24&
int i1=l; 7J~usF>A
int i2=mid+1; MHs2UN
for(int cur=l;cur<=r;cur++){ PgNg1
if(i1==mid+1) Ae&470
data[cur]=temp[i2++]; PZVh)6f"c
else if(i2>r) w1Z9@*C!
data[cur]=temp[i1++]; KrcL*j&^
else if(temp[i1] data[cur]=temp[i1++]; +{Qk9Z
else W^}fAcQKH
data[cur]=temp[i2++]; aCu 8 D!
} }9w?[hXW"
} PU0Ha
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} IMaa#8,
by 'P}
改进后的归并排序: 9oOr-9t3
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package org.rut.util.algorithm.support; `|Aj3a3sND
))y`q@
import org.rut.util.algorithm.SortUtil; [TUy><Z
i%jti6z$Hr
/** hn:
* @author treeroot -O.q$D=as
* @since 2006-2-2 ,>6s~'
* @version 1.0 muMb pF
*/ [If%+mHdU
public class ImprovedMergeSort implements SortUtil.Sort { -;5WMX6
/U |@sw4
private static final int THRESHOLD = 10; cG)i:
D6cqON0a.
/* 3lw KV
* (non-Javadoc) (;RmfE'PX
* "bI'XaSv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )%8;C]G;
*/ jH+ddBVA
public void sort(int[] data) { Up:<NHJT
int[] temp=new int[data.length]; zGtWyXP
mergeSort(data,temp,0,data.length-1); pLB~{5u>;-
} 8y9oj9 ;E]
PQ6.1}
private void mergeSort(int[] data, int[] temp, int l, int r) { } 0su[gy[
int i, j, k; IYeX\)Gv&
int mid = (l + r) / 2; H/qv%!/o
if (l == r) Ne{2fV>8Ay
return; C%hMh/Li;
if ((mid - l) >= THRESHOLD) :A+nmz!z
mergeSort(data, temp, l, mid); ^FaBaDcnl
else YNEPu:5J
insertSort(data, l, mid - l + 1); SFKfsb!C
if ((r - mid) > THRESHOLD) e^;<T9Esr
mergeSort(data, temp, mid + 1, r); L9,;zkgo
else 0L3v[%_j"
insertSort(data, mid + 1, r - mid); O=2"t%Gc
{0a (R2nB
for (i = l; i <= mid; i++) { xq#YBi,
temp = data; du,mbTQib
} [sxJ<
for (j = 1; j <= r - mid; j++) { ,,U8X [A
temp[r - j + 1] = data[j + mid]; `:=af[n
} )Sz2D[@n
int a = temp[l]; ${(c`X
int b = temp[r]; 0)@7$Xhf
for (i = l, j = r, k = l; k <= r; k++) { }n!$)W*?
if (a < b) { +M@,CbqD
data[k] = temp[i++]; H0!W:cIS;l
a = temp; ;,d^=:S6@
} else { ="~yD[S
data[k] = temp[j--]; x4b.^5"`:
b = temp[j]; (jR7D"I
} "])yV
} --t"X<.z
} \^l273
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/** T7F)'Mx<
* @param data ??X3teO{
* @param l IP#w
* @param i BZ2frG\0&I
*/ 0rnne L
private void insertSort(int[] data, int start, int len) { Z/Vb_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Me*woCos'
} %(f&).W
} ssf.ef$
} l1<]pdLTR
} i3bDU(GS
E5>y?N
堆排序： MST\_s%[
e}F1ZJz
package org.rut.util.algorithm.support; vKX6@eg"
}"QV{W
import org.rut.util.algorithm.SortUtil; {x&"b-
@;^7kt
/** #YABbwH
* @author treeroot (z8^^j[
* @since 2006-2-2 .ty^k@J|]
* @version 1.0 Mg7nv\6
*/ 71g\fGG\
public class HeapSort implements SortUtil.Sort{ khXp}p!Zm
:6N'%LKK
/* (non-Javadoc) >q+q];=(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N:4oVi@Je
*/ P#gY-k&Nr
public void sort(int[] data) { VG)Y$S8.>
MaxHeap h=new MaxHeap(); EWU(Al T
h.init(data); cx+li4v
for(int i=0;i h.remove(); XIS.0]~
System.arraycopy(h.queue,1,data,0,data.length); '4T]=s~N
} V~9vf*X
QTy xx
private static class MaxHeap{ /o/0 9K
">-mZ'$#L
void init(int[] data){ <B3v4f
this.queue=new int[data.length+1]; /,tQdD&
for(int i=0;i queue[++size]=data; ('9LUFw\
fixUp(size); -GqMis}c
} D'nO
} [@"7qKd1
4E"OD+
private int size=0; J|'e.1v
r.JY88"
private int[] queue; $y2"Q,n+
G$P|F6
public int get() { "OdR"M(G\
return queue[1]; H#Aar
} l^LYSZg'R8
|=\w b^l+
public void remove() { oo+nqc`,O
SortUtil.swap(queue,1,size--); ZysZS%
fixDown(1); H@j D%
} W-72&\7
file://fixdown BAJEn6f?
private void fixDown(int k) { *[@k=!73
int j; y*f5_
while ((j = k << 1) <= size) { Q?1' JF!G
if (j < size %26amp;%26amp; queue[j] j++; S4'\=w#
if (queue[k]>queue[j]) file://不用交换 8J5{}4s\f
break; @2Spfj_e
SortUtil.swap(queue,j,k); CO)BF%?B
k = j; L\`uD[g
} h8ND=(
} !BQ:R(w
private void fixUp(int k) { )/B' ODa
while (k > 1) { ljS~>&
int j = k >> 1; o<J_?7c~}
if (queue[j]>queue[k]) |=xK-;qs
break; g_T[m*
SortUtil.swap(queue,j,k); *.+Eg$'~V
k = j; t%B ,ATW
} %wc=Mf
} ;X9nYH
t7(#Cuv-
} N1pw*<&
88]UA
} m4 :|
0\Q/$#3
SortUtil： Z*M]AvO+#
Fq-AvU
package org.rut.util.algorithm; s={jwI50
@@])B#
import org.rut.util.algorithm.support.BubbleSort; BB>R=kt
import org.rut.util.algorithm.support.HeapSort; !_ng_,J
import org.rut.util.algorithm.support.ImprovedMergeSort; X}-)io
import org.rut.util.algorithm.support.ImprovedQuickSort; <8'-azpJ6<
import org.rut.util.algorithm.support.InsertSort; t+2!"Jr
import org.rut.util.algorithm.support.MergeSort; Vk#wJ-
import org.rut.util.algorithm.support.QuickSort; F$!K/Mm[
import org.rut.util.algorithm.support.SelectionSort; 9q4%s?)j
import org.rut.util.algorithm.support.ShellSort; O6P{+xj$
)S,Rx
/** &B;M.sz~C4
* @author treeroot *k(|r>
* @since 2006-2-2 L^7"I 4=(D
* @version 1.0 :*/'W5iM
*/ a$~pAy5C
public class SortUtil { [VsTyqV a
public final static int INSERT = 1; ~S$\ PG4
public final static int BUBBLE = 2; LH"CIL2
public final static int SELECTION = 3; ~zcHpxO^W
public final static int SHELL = 4; 4"=(kC~~
public final static int QUICK = 5; Pd~{XM,yfW
public final static int IMPROVED_QUICK = 6; C `>1x`n
public final static int MERGE = 7; S(c&XJR
public final static int IMPROVED_MERGE = 8; GJ3@".+6
public final static int HEAP = 9; pKxq\U
)PU_'n=>
public static void sort(int[] data) { `!JcQ'u
sort(data, IMPROVED_QUICK); ly8IrgtKy
} }kCaTI?@#
private static String[] name={ mfI>1W(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DO^K8~]
}; $?e_l
E&wz0d;gf
private static Sort[] impl=new Sort[]{ ^J[r<Dm8F
new InsertSort(), {cW%i:
new BubbleSort(), v Mi&0$
new SelectionSort(), qkLp8/G>pO
new ShellSort(), 6UXDIg=
new QuickSort(), zj+.MG04
new ImprovedQuickSort(), q>E[)\+y
new MergeSort(), 8d!t"oj68
new ImprovedMergeSort(), da,Bnze0
new HeapSort() A:?|\r
}; y9#r SA*
#7Pnw.s3zz
public static String toString(int algorithm){ saj%[Gsy
return name[algorithm-1]; `F^~*FnR,B
} uE}A-\G
{tN?)~ZQ
public static void sort(int[] data, int algorithm) { WqHsf1?N
impl[algorithm-1].sort(data); %+{[%?xh
} N1vPY]8
}%@q; "9`
public static interface Sort { 8}^R jMgI
public void sort(int[] data); ):c)$$dn
} !=Hu?F p
e[:i`J2
public static void swap(int[] data, int i, int j) { z+k[HE^S
int temp = data; $BPTk0Y
data = data[j]; @rV|7%u
data[j] = temp; SdJGhU
} 65>1f
} ;4!,19AT