[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; B[7Fq[.mh
} {$_Gjv
int i1=l; Rs "#gT
int i2=mid+1; M4L<u,\1s
for(int cur=l;cur<=r;cur++){ rCdTn+O2
if(i1==mid+1) S2~im?^21
data[cur]=temp[i2++]; I=4G+h5p
else if(i2>r) XlxM.;i0H
data[cur]=temp[i1++]; s[u*~A
else if(temp[i1] data[cur]=temp[i1++]; L&Pj0K-HT3
else 249DAjn+
data[cur]=temp[i2++]; dPF*G$
} e3%dNa
} idY Xv)R
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} NPt3#k^bW
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改进后的归并排序: "V<7X%LIX
(iu IeJ^Z
package org.rut.util.algorithm.support; dwUs[v
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import org.rut.util.algorithm.SortUtil; W,[iRmxn
fvZ[eJ
/** C9nCSbGMY{
* @author treeroot O+ J0X*&x
* @since 2006-2-2 _/h<4G6A
* @version 1.0 xnC5WF7
*/ wRe2sjM
public class ImprovedMergeSort implements SortUtil.Sort { G,,f' >
7Y&W^]UZ0t
private static final int THRESHOLD = 10; MRxzOs
WogJ~N,d53
/* \zR@FOl`q
* (non-Javadoc) jmxjiJKP
* w=vK{h#8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VU J*\Sg
*/ #(j'?|2o%
public void sort(int[] data) { dGt;t5AnV
int[] temp=new int[data.length]; ]OL O~2j
mergeSort(data,temp,0,data.length-1); oS 7q#`
} ry\Nm[SQ
=H%c/Jty
private void mergeSort(int[] data, int[] temp, int l, int r) { fW~r%u .y
int i, j, k; QFY1@2EC
int mid = (l + r) / 2; bX6eNk-L
if (l == r) >'iXwe-
return; yw `w6Z3K
if ((mid - l) >= THRESHOLD) ,j>A[e&.
mergeSort(data, temp, l, mid); 2a'b}<|[(
else g VX
insertSort(data, l, mid - l + 1); Cp`)*P2
if ((r - mid) > THRESHOLD) Eyv%"+>
mergeSort(data, temp, mid + 1, r); sgu#`@o
else -f@~{rK.L
insertSort(data, mid + 1, r - mid); 9dn~nnd'n
3B8\r}L
for (i = l; i <= mid; i++) { lK;|ciq"c7
temp = data; h)fJ2]JW8W
} [0<N[KZ)
for (j = 1; j <= r - mid; j++) { _^]2??V
temp[r - j + 1] = data[j + mid]; hg[ob+"
} OPOL-2<wiy
int a = temp[l]; }c|)i,bL
int b = temp[r]; P>n}\"z4
for (i = l, j = r, k = l; k <= r; k++) { n`gW&5,,z
if (a < b) { o|u<tuUW
data[k] = temp[i++]; =$xxkc.~G
a = temp; ;}"!|
} else { RG[b+Qjn
data[k] = temp[j--]; bwN>E+
b = temp[j]; -7{qTe{
} E>>@X^ =
} +)YU/41W
} F7[ 55RcP
P(AcDG6K
/** 6?\X)qBI
* @param data |:)UNb?R"O
* @param l ukNB#2"
* @param i Q#!|h:K
*/ >F7v'-*{
private void insertSort(int[] data, int start, int len) { En-BT0o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H|@R+
} /WqiGkHV*
} 2smQD8t
} Eci,];S7
} cl3@+v1
-aj) _.d
堆排序： nz-( 8{ae
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package org.rut.util.algorithm.support; +2Xq+P
fu 0]BdM
import org.rut.util.algorithm.SortUtil; Qmbl_#
";vP77|m7R
/** W[ZW=c
* @author treeroot Mzfuthq=@
* @since 2006-2-2 M{)7C,'
* @version 1.0 ?-.Qv1hs6p
*/ ..u2IdEu
public class HeapSort implements SortUtil.Sort{ Fh[Gq
+,wCV2>\3
/* (non-Javadoc) Dq$co1eT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @xu/&pbI
*/ Cx,)$!1
public void sort(int[] data) { 22`N(_
MaxHeap h=new MaxHeap(); `-,yJ
h.init(data); IgxZ_2hO
for(int i=0;i h.remove(); fwWE`BB
System.arraycopy(h.queue,1,data,0,data.length); fG{ 9doUD
} A]x'!qa@=
T][r'jWQ
private static class MaxHeap{ Wu:@+~J.h
=A yDVWpE
void init(int[] data){ Lc0yLm
this.queue=new int[data.length+1]; f*uD9l%/
for(int i=0;i queue[++size]=data; 4=b{k,kzgA
fixUp(size); 6e%|.}U
} \@%sX24D
} RMrrLT
<;T$?J9
private int size=0; Po+tk5}''5
~YYg~6}vV
private int[] queue; |N^z=g P[
gp?|UMA9.
public int get() { Y$L>tFA
return queue[1]; n-%8RV
} BUp,bJpO
T@. $Zpz
public void remove() { pbM"tr_A{
SortUtil.swap(queue,1,size--); bM%c*_$F7
fixDown(1); ^KK9T5H
} NbDfD3 1GK
file://fixdown rwRb _eIj
private void fixDown(int k) { =z]8;<=pL
int j; C6"bGA
while ((j = k << 1) <= size) { #9Fe,
if (j < size %26amp;%26amp; queue[j] j++; .F*2]xj@"
if (queue[k]>queue[j]) file://不用交换 YflotlT}
break; $S|2'jc
SortUtil.swap(queue,j,k); _:tclBc8R
k = j; ilyQgEjC
} qZ39TTQ*p
} 5xEk 7g.
private void fixUp(int k) { bhFAt1h
while (k > 1) { B-OuBS,fwC
int j = k >> 1; .)wj{(>TJ
if (queue[j]>queue[k]) z~g7O4#
break; NgKbf vt
SortUtil.swap(queue,j,k); @j$tpz
k = j; dXh@E7
} DytOS}/^9
} +q]
*@Z/L26s;=
} s)HbBt-
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} Tk-PCra
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SortUtil： ->}K-n ),
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package org.rut.util.algorithm; wLD/#Hfi7
n@BE*I<"
import org.rut.util.algorithm.support.BubbleSort; qy@gW@IU
import org.rut.util.algorithm.support.HeapSort; J p .wg
import org.rut.util.algorithm.support.ImprovedMergeSort; h*hV
import org.rut.util.algorithm.support.ImprovedQuickSort; rsfA.o
import org.rut.util.algorithm.support.InsertSort; %^"Tz,f
import org.rut.util.algorithm.support.MergeSort; uLb- NxQ-
import org.rut.util.algorithm.support.QuickSort; 2 c'=^0:
import org.rut.util.algorithm.support.SelectionSort; N_L&!%s
import org.rut.util.algorithm.support.ShellSort; _]tR1T5e
8N(bLGUG
/** H/Goaf%
* @author treeroot mN?'Aey
* @since 2006-2-2 ##u+[ !
* @version 1.0 8N6a=[fv<
*/ K 3&MR=#^
public class SortUtil { vD) LRO Z
public final static int INSERT = 1; )1j~(C)E8
public final static int BUBBLE = 2; -baGr;,Cu
public final static int SELECTION = 3; 5%?La`C9[
public final static int SHELL = 4; 5]; 8
public final static int QUICK = 5; SlZL%C;
public final static int IMPROVED_QUICK = 6; f\~e&`PV
public final static int MERGE = 7; VR_+/,~
public final static int IMPROVED_MERGE = 8; 1elcP`N1
public final static int HEAP = 9; 2>fG}qYy$
-ihF)^"a
public static void sort(int[] data) { ynM{hN.+H
sort(data, IMPROVED_QUICK); A i9*w?C
} 1y0.tdI(
private static String[] name={ S97.O@V!$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qvYYKu
}; U]hQ#a+
+@%9pbM"z
private static Sort[] impl=new Sort[]{ ":7cZ1VN2
new InsertSort(), /GM-#q a
new BubbleSort(), EemKYcE@Nr
new SelectionSort(), h,140pW
new ShellSort(), QJdSNkc6
new QuickSort(), K!I]/0L
new ImprovedQuickSort(), \U !<-
new MergeSort(), YXIDqTA+
new ImprovedMergeSort(), 308w0eP
new HeapSort() x0lX6 |D
}; ts?b[v
d'[aOH4}
public static String toString(int algorithm){ c_ygwO3.Q
return name[algorithm-1]; fy_'K}i3k
} 0^E!P>
i6`8yw
public static void sort(int[] data, int algorithm) { /=e[(5X|O
impl[algorithm-1].sort(data); z(\H.P#
} sgX}`JH?z
g=U?{<8.m
public static interface Sort { 6{7O
public void sort(int[] data); &g& &-=7)
} lh#GD"^(w&
3Vw%[+lY9
public static void swap(int[] data, int i, int j) { M0]l!x#7
int temp = data; Cg{$$&_(Hj
data = data[j]; iBo-ANnK9
data[j] = temp; (ZEVbAY?i
} EL}v>sC
} p\-.DRwT`