[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; hw]x T5
} eFS;+?bu
int i1=l; =EwC6+8*M
int i2=mid+1; H"lq!C`
for(int cur=l;cur<=r;cur++){ kSoa'
if(i1==mid+1) }bIbMEMn
data[cur]=temp[i2++]; ee}&~%
else if(i2>r) E uxD,(
data[cur]=temp[i1++]; s"*ZQ0OaD
else if(temp[i1] data[cur]=temp[i1++]; 8$9<z
else vpu20?E>5z
data[cur]=temp[i2++]; de{@u<YZb
} {#"[h1
} uLXMEx<^
$?RxmWsP
} &6 .r=,BO
uz-O%R-
改进后的归并排序: h^o>9s/|/H
A3D"b9<D
package org.rut.util.algorithm.support; Z9TmX A@
.`qw8e}y#'
import org.rut.util.algorithm.SortUtil; j6<o,0P
#rnO=N8
/** 5#kN<S!
* @author treeroot *9.4AW~]X
* @since 2006-2-2 x9S~ns+r
* @version 1.0 GBnf]A,^@
*/ nv>|,&;
public class ImprovedMergeSort implements SortUtil.Sort { j_L1KB*
C3 >X1nU
private static final int THRESHOLD = 10; ^y:!=nX^
1t7vP;
/* l]tda(
* (non-Javadoc) CqHCJ '
* p2T<nP<Pt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5n,?&+*L
*/ USBU?WDt
public void sort(int[] data) { t* eZe`|
int[] temp=new int[data.length]; rC )pCC
mergeSort(data,temp,0,data.length-1); /4x3dwXW@
} > Q[L,I
!Ab4'4f
private void mergeSort(int[] data, int[] temp, int l, int r) { oAaUXkQE
int i, j, k; 2}:{}pw
int mid = (l + r) / 2; #+$pE@u7A
if (l == r) n?uVq6c
return; L[v-5u)
if ((mid - l) >= THRESHOLD) nO-1^HUl
mergeSort(data, temp, l, mid); $&IF#uDf
else ]6JI((
insertSort(data, l, mid - l + 1); JBzRL"|
if ((r - mid) > THRESHOLD) G-FeDP
mergeSort(data, temp, mid + 1, r); vb^/DMhz
else i$`OOV=/e
insertSort(data, mid + 1, r - mid); "eKNk
#r{`Iv?nn
for (i = l; i <= mid; i++) { c*F'x-TH
temp = data; C'5b)0km
} xF|P6GXg
for (j = 1; j <= r - mid; j++) { *\W *,D.I
temp[r - j + 1] = data[j + mid]; 4rXjso|
} /;P* ?
int a = temp[l]; Y\#+-E
int b = temp[r]; ,]CZ(q9-
for (i = l, j = r, k = l; k <= r; k++) { .FV wZ:d
if (a < b) { B,rpc\_
data[k] = temp[i++]; d3%1P)
a = temp; E1'| ;}/
} else { k)l*L1Y4:
data[k] = temp[j--]; cj-_
b = temp[j]; {zGM[A
} 2@!Ou$W
} #$/SM_X14C
} P!uwhha/g
H#P)n R M
/** H_3-"m&3
* @param data ]<y _ =>
* @param l g$=y#<2?
* @param i *c"tW8uR
*/ Hz A+Oi
private void insertSort(int[] data, int start, int len) { BEU^,r3z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hzos$1DJ
} Fh)`A5#
} wD9Gl.uQ
} bD*z"e
} TF0DQP
P?QVT;]
堆排序： a+wc"RQ |
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package org.rut.util.algorithm.support; G3 h&nH,>
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import org.rut.util.algorithm.SortUtil; 0LQ|J(u
Z?XgY\(a(Q
/** <qGVOAnz+
* @author treeroot Z]Zs"$q@
* @since 2006-2-2 mv%Zh1khn/
* @version 1.0 'ju
*/ |q0MM^%"
public class HeapSort implements SortUtil.Sort{ [):&R1U
I,rs&m?/m
/* (non-Javadoc) Vs/Z8t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >J!J:
*/ Mv\odf\]
public void sort(int[] data) { g7>p,
MaxHeap h=new MaxHeap(); 8Xo`S<8VS
h.init(data); 1w30Vj2<
for(int i=0;i h.remove(); :Ng4? +@r
System.arraycopy(h.queue,1,data,0,data.length); ;|nC;D]
} [X9s\H
drv"I[}{A
private static class MaxHeap{ MXQS6F#
_6Ex}`fyJ
void init(int[] data){ ZH@BHg|}H
this.queue=new int[data.length+1]; h~\bJ*Zp
for(int i=0;i queue[++size]=data; ]g}Tqf/N%
fixUp(size); ]t4 9Efw
} &DUt`Dr w
} 0/r\#"+XT
G/cE2nD
private int size=0; ^;KL`
lQt&K1m
private int[] queue; jg,oGtRz
dV~yIxD}C*
public int get() { T[$! ^WT
return queue[1]; CO+[iJ,4C+
} P5&mpl1
ss8de9T"'
public void remove() { /CXrxeo
SortUtil.swap(queue,1,size--); PA=.)8
fixDown(1); WKHEU)'!
} \&|zD"*
file://fixdown NZj_7j|o9
private void fixDown(int k) { ?AL;m.X-@
int j; Stq [[S5P
while ((j = k << 1) <= size) { a.oZ}R7'Y
if (j < size %26amp;%26amp; queue[j] j++; t&GjW6]W
if (queue[k]>queue[j]) file://不用交换 ch^tq",1>
break; ;,z[|"y
SortUtil.swap(queue,j,k); xr }jw
k = j; +N~?_5lv\s
} &HS6}
} 3n\eCdV-b<
private void fixUp(int k) { e3|@H'~k
while (k > 1) { VaLx-RX
int j = k >> 1; 8Gw0;Uu8D
if (queue[j]>queue[k]) kO1.27D
break; 4sj:%%UE
SortUtil.swap(queue,j,k); <%@S-+D`]
k = j; ~-1!?t/%
} d;Uzl1;
} pO2Y'1*
aP%&-W$D|
} ZO`{t1
5LPyPL L
} |~6X: M61
N*dO'ol
SortUtil： cqr4P`Oj
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package org.rut.util.algorithm; 9`3%o9V9Y
f/_RtOSw
import org.rut.util.algorithm.support.BubbleSort; Z(' iZ'55F
import org.rut.util.algorithm.support.HeapSort; M- f)\`I
import org.rut.util.algorithm.support.ImprovedMergeSort; 01UEd8
import org.rut.util.algorithm.support.ImprovedQuickSort; d=q&UCC
import org.rut.util.algorithm.support.InsertSort; Wq4>!|
import org.rut.util.algorithm.support.MergeSort; (|(#W+l~
import org.rut.util.algorithm.support.QuickSort; )^G&p[G
import org.rut.util.algorithm.support.SelectionSort; s'4S,
import org.rut.util.algorithm.support.ShellSort; 4bT21J37
(l|:$%[0
/** ywPFL/@
* @author treeroot @M:Uf7
* @since 2006-2-2 uk8vecj
* @version 1.0 c]qq *k#
*/ G!y~Y]e
public class SortUtil { kQr\ktN\
public final static int INSERT = 1; K):MT[/"
public final static int BUBBLE = 2; SBj9sFZ
public final static int SELECTION = 3; U\_-GS;1
public final static int SHELL = 4; =h`yc$ A(2
public final static int QUICK = 5; $m.e}`7SF!
public final static int IMPROVED_QUICK = 6; %:^|Q;xe
public final static int MERGE = 7; ;:w?&4
public final static int IMPROVED_MERGE = 8; S\qYw(G
public final static int HEAP = 9; HJ&|&tT
UR/lM,N;
public static void sort(int[] data) { OOa}+^-j
sort(data, IMPROVED_QUICK); !9$xfg}
} [Rqv49n*V
private static String[] name={ 3c#CEuu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %T.4Aj
}; dkz79G}e
GzJ("RE0)v
private static Sort[] impl=new Sort[]{ {V> >a
new InsertSort(), ERql^Yr
new BubbleSort(), qqm7p ,j
new SelectionSort(), mOLP77(o
new ShellSort(), Cst:5m0!
new QuickSort(), S 1%/ee3
new ImprovedQuickSort(), pa7Iz^i
new MergeSort(), ) o)k~6uT
new ImprovedMergeSort(), b*-g@S
new HeapSort() \2F$FRWo
}; LX4*3c|i,
Z3ucJH/)V
public static String toString(int algorithm){ Qx9lcO_
return name[algorithm-1]; G8m:]!
} (6xrs_ea
1LgzqRq
public static void sort(int[] data, int algorithm) { ZfzUvN&!
impl[algorithm-1].sort(data); 4t(V)1+
} m=Z1DJG
}CR@XD}[
public static interface Sort { N2!HkUy2
public void sort(int[] data); XO*|P\#^
} qusX]Tstz
rt\i@}
public static void swap(int[] data, int i, int j) { A4}6hG#
int temp = data; gAy,uP~,
data = data[j]; K_@[%
data[j] = temp; KL2#Bm_
} 6K/j,e>L
} _uvRC+~R