[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; ?~F]@2)5w
} 06PhrPVa!\
int i1=l; /-DKV~
int i2=mid+1; DWF >b
for(int cur=l;cur<=r;cur++){ )v${&H
if(i1==mid+1) '4J&Gpx
data[cur]=temp[i2++]; 8pXfT%]
else if(i2>r) Sp<hai
data[cur]=temp[i1++]; 1zdYBb6;j
else if(temp[i1] data[cur]=temp[i1++]; 1P5*wNF
else ~GNyE*t/Y
data[cur]=temp[i2++]; bcq@N
} f?2zLE>u
} .[edln
pO\S#GnX
} re7!p(W?,
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改进后的归并排序: zSEr4^Dk4
V8-4>H}Cb/
package org.rut.util.algorithm.support; Wl,%&H2S<
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import org.rut.util.algorithm.SortUtil; slu$2-H
0w^jls
/** \U==f&G?J
* @author treeroot %0NLRfp
* @since 2006-2-2 R|/Wz/$1A
* @version 1.0 uEBQoP2
*/ YavfjS:2
public class ImprovedMergeSort implements SortUtil.Sort { ri_P;#lz
+nU',E
private static final int THRESHOLD = 10; Xfj)gPt}
CKJAZ2
/* 4#TnXxL
* (non-Javadoc) #o"tMh!f
* OlIT|bzkb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .=?Sz*3
*/ t$aVe"uM
public void sort(int[] data) { 6!*K/2:O
int[] temp=new int[data.length]; OMl8 a B9
mergeSort(data,temp,0,data.length-1); j6`6+W=S(
} $B<~0'6}
C,[L/!
private void mergeSort(int[] data, int[] temp, int l, int r) { @=CLeQG`
int i, j, k; TLy;4R2Nn
int mid = (l + r) / 2; &q.)2o#Q.
if (l == r) O ,l\e3;
return; x]H3Y3
if ((mid - l) >= THRESHOLD) ^GN5vT+:'
mergeSort(data, temp, l, mid); `hzd|GmX
else 2K Pqu:lv
insertSort(data, l, mid - l + 1); 'zE: fLo
if ((r - mid) > THRESHOLD) F/)f,sZF
mergeSort(data, temp, mid + 1, r); ki#y&{v9Be
else K/DH / r
insertSort(data, mid + 1, r - mid); XnD0eua#
5Qb;2!
for (i = l; i <= mid; i++) { %?@x]B9Y8E
temp = data; =1O?jrl~q
} AD(xaQ&T
for (j = 1; j <= r - mid; j++) { e,^pMg~
temp[r - j + 1] = data[j + mid]; }Bd_:#.mw
} Lg8]dBXu
int a = temp[l]; *<w3" iq
int b = temp[r]; ?.8<-
for (i = l, j = r, k = l; k <= r; k++) { DQcWq'yY^
if (a < b) { 0(\p<qq
data[k] = temp[i++]; .hxin[Y
a = temp; D^$]>-^
} else { S=4R5igrC
data[k] = temp[j--]; V_jiOT!
b = temp[j]; +5#x6[
} vXc!Zg~
} /=bSt
} cY{I:MA+h@
t`uc3ta"9
/** (yfXMp,x
* @param data ]XY0c6 <
* @param l 4AJ9`1d4
* @param i P>|Ef~j
*/ g083J}08
private void insertSort(int[] data, int start, int len) { ^mAJ[^%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q Qi@>v|d
} Vw7WK
} 70{RDj6{
} @#A!w;bz
} T=.-Cl1A
UBa-
堆排序： -E:(w<];
n7@j}Q(&?
package org.rut.util.algorithm.support; @$Yb#$/
A^8x1ydZ
import org.rut.util.algorithm.SortUtil; Mg+4huT
-gB{:UYi3
/** !1("(Eb
* @author treeroot !W(`<d]68:
* @since 2006-2-2 lelMt=
* @version 1.0 SGQDro=l
*/ Jlz9E|*qV
public class HeapSort implements SortUtil.Sort{ ]/a g*F
7O"hiDQ
/* (non-Javadoc) ("b*? : B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Or2iuO%-,
*/ yk`)Cq%=;
public void sort(int[] data) { 3\]~!;dI
MaxHeap h=new MaxHeap(); ,^HS`!s[ E
h.init(data); L(;.n>/
for(int i=0;i h.remove(); .3(;9};
System.arraycopy(h.queue,1,data,0,data.length); zqY)dk
} ]uAS+shQ&
'\ XsTs#L
private static class MaxHeap{ gXF.on4B
/ xs9.w8-
void init(int[] data){ /;7ID41
this.queue=new int[data.length+1]; ]?M)NRk%S
for(int i=0;i queue[++size]=data; .5]{M\aA
fixUp(size); n?}5!
} jK e.gA
} _%;M9Sg3
u|T%Xy=LU
private int size=0; Fk aXA.JE
v:?o3 S
private int[] queue; 9Eu #lV
]r!QmWw~V
public int get() { 6A.P6DW
return queue[1]; {79qtq%W{
} *O5:
vn``0!FX
public void remove() { V\"1wV~E
SortUtil.swap(queue,1,size--); .8:+MW/
fixDown(1); )Y~xIj>
} a&N%|b K
file://fixdown Vli3>K&
private void fixDown(int k) { -( (Z@T1k
int j; O<>#>[
while ((j = k << 1) <= size) { s+'XQs^{aj
if (j < size %26amp;%26amp; queue[j] j++; !:dL~n
if (queue[k]>queue[j]) file://不用交换 b#A(*a_gN
break; $M39 #a
SortUtil.swap(queue,j,k); :,47rN,qa
k = j; Hk~k@Wft
} + LS3T^
} _=?2 3
private void fixUp(int k) { #>XeR>T
while (k > 1) { ]{Z8
int j = k >> 1; %2}C'MqS
if (queue[j]>queue[k]) EDtCNqBS~2
break; #3.\j"b
SortUtil.swap(queue,j,k); IqNpLh|[
k = j; rpSr^slr
} k8 u%$G
} m9woredS,
"Tv:*L5
} `[OXVs,7"
GyuV %
} =&N$Vqn
:6zC4Sr^
SortUtil： =},{8fZ4
&kiF/F 1
package org.rut.util.algorithm; TOrMXcn!/
0d";Hh:
import org.rut.util.algorithm.support.BubbleSort; aiJnfU]W
import org.rut.util.algorithm.support.HeapSort; bs BZE
import org.rut.util.algorithm.support.ImprovedMergeSort; R3Ee%0QK
import org.rut.util.algorithm.support.ImprovedQuickSort; Fe5jdV<
import org.rut.util.algorithm.support.InsertSort; cLAesj
import org.rut.util.algorithm.support.MergeSort; Tt%}4{"
import org.rut.util.algorithm.support.QuickSort; Nq_A8Ph9
import org.rut.util.algorithm.support.SelectionSort; VVFV8T4
import org.rut.util.algorithm.support.ShellSort; jWSb5#Pw
^4 8\>-Q\
/** 7OE[RX8!f
* @author treeroot $o"g73`3
* @since 2006-2-2 bNXAU\M^
* @version 1.0 iE=P'"I
*/ ewym1}o
public class SortUtil { |by@ :@*y
public final static int INSERT = 1; /p 5=i
public final static int BUBBLE = 2; vf N#NY6
public final static int SELECTION = 3; &wb9_?ir-
public final static int SHELL = 4; p/3BD&6
public final static int QUICK = 5; [Y$V\h=V
public final static int IMPROVED_QUICK = 6; L1{T ?aII
public final static int MERGE = 7; rnH}#u+
public final static int IMPROVED_MERGE = 8; rH.gF43O:
public final static int HEAP = 9; p1~*;;F
6g~+( ({lQ
public static void sort(int[] data) { D^|7#b,zcH
sort(data, IMPROVED_QUICK); G5;V.#"Z[
} LN\[Tmd &
private static String[] name={ Z\'wm'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PtqGX=u
}; 8 URj1 W
Fg4@On[,i
private static Sort[] impl=new Sort[]{ :~D];m
new InsertSort(), Zih ?Bm
new BubbleSort(), >C# kqxfg
new SelectionSort(), cQn)^jx=
new ShellSort(), [@|be.g
new QuickSort(), A="fj
new ImprovedQuickSort(), Ye@t_,)x
new MergeSort(), n,sY\=vB
new ImprovedMergeSort(), `m, Ki69.
new HeapSort() N+J>7_k
}; s/h7G}Mu
ul=7>";=|
public static String toString(int algorithm){ ;s}3e#$L
return name[algorithm-1]; 7k~Lttuk
} ]F+K|X9-
1`QsW&9=b
public static void sort(int[] data, int algorithm) { lQL:3U0DjU
impl[algorithm-1].sort(data); tr=@+WHp
} ]u0Jd#@
a_{6Qdl
public static interface Sort { 1eD.:_t4
public void sort(int[] data); :<%vE!$
} c3#q0Ma
Vo >Xp
public static void swap(int[] data, int i, int j) { ="3,}qR
int temp = data; K}K)`bifw
data = data[j]; UJn/s;$.e
data[j] = temp; 8gI\zgS
} n`.#59-Hx
} si?HkJv5