[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; H 'WFORso[
} W(u6J#2
int i1=l; ZbZAx:L
int i2=mid+1; ;y?D1o^r8W
for(int cur=l;cur<=r;cur++){ =0@d|LeZ
if(i1==mid+1) eB(S+p?
data[cur]=temp[i2++]; r|JiGj^om
else if(i2>r) g|GvJ)VX
data[cur]=temp[i1++]; rvwl
else if(temp[i1] data[cur]=temp[i1++]; Ab^>z
else l ))~&
data[cur]=temp[i2++]; ch)Ps2i
} C]\^B6l<
} :oon}_MdRd
M0;t%*1
} q/rHHuY}
2-cU -i4
改进后的归并排序: 8ACYuN\
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package org.rut.util.algorithm.support; 07T;IV3#C5
j &0fC!k
import org.rut.util.algorithm.SortUtil; 9d,]_l.sB
m>Z\ rqOK
/** Ul$X%
* @author treeroot w{:Oa7_A
* @since 2006-2-2 +AgkPMy
* @version 1.0 *Lb(urf
*/ 0?5%
public class ImprovedMergeSort implements SortUtil.Sort { Fl#VKU3h
ERX|cc
private static final int THRESHOLD = 10; !5E%W[
XW&8T"q7
/* Q[ 9rA
* (non-Javadoc) :C|>y4U&(s
* g'}`FvADi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lE2wkY9^/
*/ [)J49
public void sort(int[] data) { Vlp*'2VO
int[] temp=new int[data.length]; [MQJ71(3
mergeSort(data,temp,0,data.length-1); [o[v"e\w
} cmr6,3_
ok\/5oz
private void mergeSort(int[] data, int[] temp, int l, int r) { @KXz4PU
int i, j, k; &,Zz
int mid = (l + r) / 2; -u3SsU)_%N
if (l == r) cDQw`ORP*g
return; G0 nH Z6
if ((mid - l) >= THRESHOLD) LDi ezi
mergeSort(data, temp, l, mid); o+X'(!Trw
else ;@7#w
insertSort(data, l, mid - l + 1); p^zEfLTU
if ((r - mid) > THRESHOLD) d_WnK{
mergeSort(data, temp, mid + 1, r); Wf`OyeRz
else LO$#DHPt
insertSort(data, mid + 1, r - mid); Q:fUM[
YP\4XI
for (i = l; i <= mid; i++) { Ng_rb KXC#
temp = data; \}4#**]
} 2=/g~rp*
for (j = 1; j <= r - mid; j++) { tO+%b=Z^
temp[r - j + 1] = data[j + mid]; Og;$P'U
} C5sN[
int a = temp[l]; '+q'H
int b = temp[r]; sw qky5_K
for (i = l, j = r, k = l; k <= r; k++) { E/L?D
if (a < b) { m)[wZP*e
data[k] = temp[i++]; h@>rjeY@
a = temp; G5QgnxwP2
} else { /nMqEHCyg
data[k] = temp[j--]; '/yx_RK2?
b = temp[j]; $Op/5j
} {^$"/hj
} HDW\S#
} 1:;&wf
LnRi+n[@7
/** qq9tBCk
* @param data RP@idz
* @param l t1RwB23
* @param i 8#Z\}gGz
*/ 9J;H.:WH
private void insertSort(int[] data, int start, int len) { ^qzT5W\@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MlC-Aad(
} K`_E>k
} gH{\y5%rO
} C#?d=x
} b1>$sPJ+
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堆排序： qYu!:xa8
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package org.rut.util.algorithm.support; RH'F<!p
*(SBl}f4l
import org.rut.util.algorithm.SortUtil; A$"$`)P!
#u=O 5%.
/** Ff#N|L'9_
* @author treeroot fN*4(yw
* @since 2006-2-2 ubCJZ"!
* @version 1.0 k#=leu"I
*/ 7quwc'!
public class HeapSort implements SortUtil.Sort{ r+#V{oE_
= cI\OsV&?
/* (non-Javadoc) Y`O}]*{>8R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y)j,(9
*/ 5$"[gdt)T
public void sort(int[] data) { {8bY7NH|
MaxHeap h=new MaxHeap(); Bzy=@]`
h.init(data); HG3>RcB
for(int i=0;i h.remove(); qP^0($
System.arraycopy(h.queue,1,data,0,data.length); E~g}DKs_5
} )RCqsFjK
wPO@f~[Ji
private static class MaxHeap{ K?OX
Zn 5m.=z
void init(int[] data){ kFa?q}47
this.queue=new int[data.length+1]; eNC5' Z
for(int i=0;i queue[++size]=data; &qI5*aQ8T
fixUp(size); oJp_c
} mlw BATi
} $XU$?_O
V_d%g<n4
private int size=0; UCj#t!Mw
Dp6"I!L<|
private int[] queue; 0?L$)T-B
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public int get() { n_Hnk4
return queue[1]; 3{LvKe
} +VW]%6+
2Ku#j ('
public void remove() { y`@4n.Q
SortUtil.swap(queue,1,size--); B l/e>@M
fixDown(1); z` ?xS
} nT.2jk+
file://fixdown "yq;{AGOGl
private void fixDown(int k) { \w_[tPz}
int j; ]<_!@J6k
while ((j = k << 1) <= size) { %C][E^9
if (j < size %26amp;%26amp; queue[j] j++; >]|^Ux,WZ
if (queue[k]>queue[j]) file://不用交换 dvWlx]'
break; __n"DLW
SortUtil.swap(queue,j,k); n|,Vm@zV
k = j; HY|SLk/E
} ,Y5 4(>>%
} #<>E+r+
private void fixUp(int k) { zr9Pm6Rl
while (k > 1) { qlT:9*&g
int j = k >> 1; fU~y481A
if (queue[j]>queue[k]) S_-mmzC(
break; ]{U*+K%,J
SortUtil.swap(queue,j,k); 6)<oO(
k = j; -Izg&u &
} jW$f(qAbm
} n$0)gKN7
z'K7J'(R
} G}xBYc0b
W2(=m!:U
} xs`gN
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SortUtil： 2}Plr{s9
AX Jj"hN
package org.rut.util.algorithm; *ik)>c_
B=/=U7T
import org.rut.util.algorithm.support.BubbleSort; &>4$ [m>n
import org.rut.util.algorithm.support.HeapSort; 9U1!"/F
import org.rut.util.algorithm.support.ImprovedMergeSort; so&3A&4cL
import org.rut.util.algorithm.support.ImprovedQuickSort; (qONeLf%
import org.rut.util.algorithm.support.InsertSort; os ud
import org.rut.util.algorithm.support.MergeSort; i1&noRGl
import org.rut.util.algorithm.support.QuickSort; D.x3@+
import org.rut.util.algorithm.support.SelectionSort; ,ZW.P`
import org.rut.util.algorithm.support.ShellSort; L`@&0Zk
?gP/XjToMg
/** "MP{z~Mmj
* @author treeroot \`9|~!,Ix7
* @since 2006-2-2 { 3P!b|V>
* @version 1.0 9>, \QrrH
*/ *<5lx[:4/x
public class SortUtil { iZ;jn8
public final static int INSERT = 1; sh3}0u+
public final static int BUBBLE = 2; Ec/+9H6g
public final static int SELECTION = 3; BU\NBvX$
public final static int SHELL = 4; JkEQ@x
public final static int QUICK = 5; -;.fU44O[#
public final static int IMPROVED_QUICK = 6; }(O kl1
public final static int MERGE = 7; $4)guG)
public final static int IMPROVED_MERGE = 8; m,fr?d/;
public final static int HEAP = 9; QncS&
|8+rUFkU8
public static void sort(int[] data) { L| qY
sort(data, IMPROVED_QUICK); ArKrsI#H-
} EqwA8?M
private static String[] name={ OU=IV;V{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dp'af4+%$
}; ;G&O"S><]c
~i {)J
private static Sort[] impl=new Sort[]{ TU6EE
new InsertSort(), &G,v*5N8$K
new BubbleSort(), L7'n<$F
new SelectionSort(), KiHAm|,
new ShellSort(), .qP zd(<T7
new QuickSort(), n8C {Okr
new ImprovedQuickSort(), !}m8]&
new MergeSort(), fP*C*4#X
new ImprovedMergeSort(), KDzIarC
new HeapSort() 7cSvAX0Z.
}; 0drc^rj !
j}Mpc;XOc
public static String toString(int algorithm){ M/ \~
return name[algorithm-1]; BNLall
} Pl ,M>IQ
v3]M;Y\
public static void sort(int[] data, int algorithm) { N#qoKY(#
impl[algorithm-1].sort(data); wOSNlbQ5jl
} O3^@"IY
O$\N]#
public static interface Sort { wIPDeC4
public void sort(int[] data); VJPPHJ[-
} UcIR0BYa
of<OOh%3
public static void swap(int[] data, int i, int j) { DvKMb-*S
int temp = data; Cu5 - w
data = data[j]; 7k3\_BHyb\
data[j] = temp; A]slssE+
} N* QI>kzU
} #`EMK