[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; D/@:wY
} E hd*
int i1=l; X Uh)z
int i2=mid+1; RFQa9Rxk
for(int cur=l;cur<=r;cur++){ HZfcLDrO
if(i1==mid+1) YBHmd
data[cur]=temp[i2++]; P%%Cd
else if(i2>r) :R<,J=+$u
data[cur]=temp[i1++]; <t]i'D(K
else if(temp[i1] data[cur]=temp[i1++]; 7&m*: J
else >UR-37g{p
data[cur]=temp[i2++]; }b6ja y
} b>I -4
} $~zqt%}
) ,*&rd!
} A+;]# 1y(D
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改进后的归并排序: 1c?,= ;>
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package org.rut.util.algorithm.support; +w GE
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import org.rut.util.algorithm.SortUtil; vEn12s(lj
qX-Jpi P
/** So0YvhZ+
* @author treeroot f-4<W0%
* @since 2006-2-2 T5W r;a
* @version 1.0 s~M!yuH
*/ t2tH%%Rs
public class ImprovedMergeSort implements SortUtil.Sort { |$7!u DU8
-D{~7&
private static final int THRESHOLD = 10; `^F'af
>.J68x
/* 3cQTl5,
* (non-Javadoc) CaZEU(i
* Tje =vI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VY~WkSi[<
*/ 4lvo9R
public void sort(int[] data) { }_5z(7}3
int[] temp=new int[data.length]; ^>[DG]g
mergeSort(data,temp,0,data.length-1); q& 4Z.(
} *R1x^t+)
r")=Z1y
private void mergeSort(int[] data, int[] temp, int l, int r) { VaSw}q/o:/
int i, j, k; o"QpV >x
int mid = (l + r) / 2; ^ /:]HG
if (l == r) 8>Ervi`
return; v%86JUlK.
if ((mid - l) >= THRESHOLD) +z("'Cv
mergeSort(data, temp, l, mid); P,D >gxl
else r`wL_>"{n
insertSort(data, l, mid - l + 1); 5\EHu8
if ((r - mid) > THRESHOLD) 'HW(RC0dR
mergeSort(data, temp, mid + 1, r); e`#Gq0}8
else nV"[WngN
insertSort(data, mid + 1, r - mid); YM+}Mmu
YN"102CK
for (i = l; i <= mid; i++) { _lyP7$[: c
temp = data; %aL>n=$
} My_fm?n
for (j = 1; j <= r - mid; j++) { 4ol=YGCI_
temp[r - j + 1] = data[j + mid]; k]; <PF
} sks_>BM
int a = temp[l]; /=[M
int b = temp[r]; )bw>)&)b`
for (i = l, j = r, k = l; k <= r; k++) { Fk=_Q LI
if (a < b) { sy/J+==
data[k] = temp[i++]; ][wS}~):
a = temp; AVNB)K"
} else { 2MB\!fh
data[k] = temp[j--]; 8q_3*++D
b = temp[j]; !Me%W3
} vaR0`F
} ,ulNap"R
} &WvJg#f
'#u2q=n4*
/** bis/Nfr]
* @param data cr,o<
* @param l E3NYUHfZ
* @param i K<Ct
*/ [h8F)
private void insertSort(int[] data, int start, int len) { vlzjALy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _2f}WY3S
} _mXq]r0
} =CRaMjN
} B>a`mFM
} ]~kqPw<R
b39;Sv|#
堆排序： #J^p,6
D|9B1>A,m
package org.rut.util.algorithm.support; ub4(mS
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import org.rut.util.algorithm.SortUtil; pok,`yW\
*;"^b\f5_
/** K"-N:OV
* @author treeroot v6f$N+4c
* @since 2006-2-2 :CK,(?t
* @version 1.0 pklcRrx,a
*/ )S8q.h
public class HeapSort implements SortUtil.Sort{ >KGQ#hnH
@$+l ^"#-]
/* (non-Javadoc) d5^ipu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =7Tbu'O;
*/ dVe3h.,[v
public void sort(int[] data) { U@Aq@d+n
MaxHeap h=new MaxHeap(); +zL=UEBN
h.init(data); X<-]./
for(int i=0;i h.remove(); H,3$TNXy
System.arraycopy(h.queue,1,data,0,data.length); DgOoEHy[
} `yuD/-j
F<IqKgGzH
private static class MaxHeap{ ]V.9jlXF
L=HL1Qe$G]
void init(int[] data){ -6t# ?Dkc'
this.queue=new int[data.length+1]; A=h`Z^8\B
for(int i=0;i queue[++size]=data; nR"k%$
fixUp(size); .fD k5uo
} QfwGf,0p
} c%uhQ62
' P-K}Y
private int size=0; 9iS3.LCfX
X8;03EW;
private int[] queue; unD8h=Z2
o/=K:5
public int get() { ~xvQ?c?-
return queue[1]; fCEd :Kr
} _}JygOew
?{{E/J:%
public void remove() { .iew5.eB+
SortUtil.swap(queue,1,size--); zq1&MXR)l
fixDown(1); ;'J L$=
} HJg)c;u/2;
file://fixdown Z$WT ~V
private void fixDown(int k) { -t*C-C'"|
int j; @}fnR(fS
while ((j = k << 1) <= size) { C: e}}8i
if (j < size %26amp;%26amp; queue[j] j++; cs@5K$v
if (queue[k]>queue[j]) file://不用交换 BAt2m-
break; VT'$lB%IK
SortUtil.swap(queue,j,k); xYwbbFGrG
k = j; Y6{p|F?&"
} G9VzVx#T#
} o_\b{<^I
private void fixUp(int k) { nMVThN*Ig
while (k > 1) { DB>>U>H-
int j = k >> 1; n,Ux>L
if (queue[j]>queue[k]) *?KQ\ Y
break; T6phD8#
SortUtil.swap(queue,j,k); Kh% x
k = j; bk^ :6>{K
} aty K^*aX
} 'u696ED4
+m>Kb edl
} GD< Afni
$L`7(0U-
} 4r5,kOFWb
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SortUtil： x!"!oJG^k
*FG@Dts^&
package org.rut.util.algorithm; _BW$?:)9
MX9q )(:
import org.rut.util.algorithm.support.BubbleSort; *=;=VUu5
import org.rut.util.algorithm.support.HeapSort; OpH9sBnA
import org.rut.util.algorithm.support.ImprovedMergeSort; W%1fm/G0
import org.rut.util.algorithm.support.ImprovedQuickSort; G.oaDGy
import org.rut.util.algorithm.support.InsertSort; E,C<ox4e
import org.rut.util.algorithm.support.MergeSort; fylaH(LER
import org.rut.util.algorithm.support.QuickSort; \t!+]v8f8
import org.rut.util.algorithm.support.SelectionSort; 3:=XU9p)x
import org.rut.util.algorithm.support.ShellSort; ?58pkg J
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/** 9sT?"(=
* @author treeroot 0!(Ii@m=N
* @since 2006-2-2 =20Q!wcu
* @version 1.0 RbrvY
*/ ,][+:fvS
public class SortUtil { GXHk{G@TS
public final static int INSERT = 1; &Rn/c}[{
public final static int BUBBLE = 2; I[e7Up
public final static int SELECTION = 3; MGmtA(
public final static int SHELL = 4; EkTen:{G
public final static int QUICK = 5; P, S9gG9
public final static int IMPROVED_QUICK = 6; 4AF"+L
public final static int MERGE = 7; f-{[ushj
public final static int IMPROVED_MERGE = 8; IndNR:"g
public final static int HEAP = 9; EO| kiC
`_v-Y`Z
public static void sort(int[] data) { S?8q.59
sort(data, IMPROVED_QUICK); H!45w;,I
} ~$Mp>ZB2W
private static String[] name={ 0kCUz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :fj}J)9'xW
}; ; 9'*w=V
UT^t7MY#O
private static Sort[] impl=new Sort[]{ 3'.OghI
new InsertSort(), hw1ZTD:Y
new BubbleSort(), jN*A"m
new SelectionSort(), (U7%Z<
new ShellSort(), o[cKh7&+
new QuickSort(), -rH3rKtf~
new ImprovedQuickSort(), p>!r[v'
new MergeSort(), a.] !
new ImprovedMergeSort(), Z;n}*^U
new HeapSort() O-&n5
}; pP".?|n
`*N0 Lbl]
public static String toString(int algorithm){ m,.d< **
return name[algorithm-1]; r!x^P=f,MJ
} @nZFw.
cF/FretoO
public static void sort(int[] data, int algorithm) { ^|sQkufo
impl[algorithm-1].sort(data); 'Y&yt"cs
} OI`Lb\8pP
@9c^{x\4
public static interface Sort { Ok*:;G@
public void sort(int[] data); L g%cVSz/C
} e=F' O] 5
v4ueFEY
public static void swap(int[] data, int i, int j) { liU=5BL
int temp = data; MRJdQCBV
data = data[j]; GN~:rdd
data[j] = temp; H}}t)H
} #Xn#e
} x?j&Jn_@w