[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; PiB)pUYj
} Y6A]dk
int i1=l; b*Ipg8n+
int i2=mid+1; gb:Cc,F,%
for(int cur=l;cur<=r;cur++){ xsRMF&8L
if(i1==mid+1) hvBuQuk)
data[cur]=temp[i2++]; f/)3b`$Wu
else if(i2>r) !W:QLOe6F
data[cur]=temp[i1++]; Rn{q/h
else if(temp[i1] data[cur]=temp[i1++]; 2h&pm
else ;J\{r$q
data[cur]=temp[i2++]; BN4dr9T
} )<.S3
} pb%#`2"
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改进后的归并排序: 0jv9N6IM
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package org.rut.util.algorithm.support; Y tGH>0}h
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import org.rut.util.algorithm.SortUtil; @6*<Xs =
y<F$@
/** `Uk,5F5
* @author treeroot z!Kadqns
* @since 2006-2-2 hl~(&D1^
* @version 1.0 ;$i9gP[|m
*/ @ x*#7Y
public class ImprovedMergeSort implements SortUtil.Sort { v )7d
(I.uQP~H
private static final int THRESHOLD = 10; Cu;X{F'H
q1dYiG.-Z
/* <O$'3_S"D
* (non-Javadoc) l%Sz6
* qw87B!D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B_cn[?M
*/ 2|}p&~G(
public void sort(int[] data) { 8Z3+S)6
int[] temp=new int[data.length]; y8+?:=N.
mergeSort(data,temp,0,data.length-1); lRt8{GFy
} 4)j<(5
j{_MDE7N
private void mergeSort(int[] data, int[] temp, int l, int r) { N#.IpY'7Ze
int i, j, k; `ss]\46>
int mid = (l + r) / 2; {OAy@6 +
if (l == r) aDZLabRu
return; A#1y>k
if ((mid - l) >= THRESHOLD) iI&SI#; _
mergeSort(data, temp, l, mid); =As'vt 0
else *C\4%l
insertSort(data, l, mid - l + 1); 7 oZ-D~3
if ((r - mid) > THRESHOLD) HTqikw5X
mergeSort(data, temp, mid + 1, r); ?7&VT1
else h]EXD
insertSort(data, mid + 1, r - mid); N[pk@M\vX
tW=0AtZl]
for (i = l; i <= mid; i++) { Kg](kP
temp = data; 95]%j\
} X<9DE!/)
for (j = 1; j <= r - mid; j++) { q=nMZVVlF(
temp[r - j + 1] = data[j + mid]; 7DYD+N+T
} h y[_
int a = temp[l]; DBmcvC
int b = temp[r]; *R~oA`
for (i = l, j = r, k = l; k <= r; k++) { *fd` .}
if (a < b) { }4 $EN
data[k] = temp[i++]; -nk%He
a = temp; tb=L+WAIw
} else { D[-Ct
data[k] = temp[j--]; +H<%)Lk J
b = temp[j]; T!a8c<'V
} +^69>L2V
} p`d:g BZ
} ^d=Z/d[
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/** Cn`% *w
* @param data 8dZH&G@;
* @param l y mE`V
* @param i fGe{7p6XV*
*/ t!iF(R\
private void insertSort(int[] data, int start, int len) { 3p4bOT5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nVM`&azD
} un9o~3SF<
} {(MG: B
} ah<f&2f
} /gdo~
r=[}7N
堆排序： *xjIl<`pK
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package org.rut.util.algorithm.support; 9(PFd%
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import org.rut.util.algorithm.SortUtil; y(zU:.
QA9vH'
/** VN".NEL
* @author treeroot X'F$K!o*,:
* @since 2006-2-2 Qv=Z
* @version 1.0 :OZhEBL&b
*/ KWH
public class HeapSort implements SortUtil.Sort{ k %rP*b*
Cwh;+3?C|
/* (non-Javadoc) ;Dgp !*v=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lyeoSd1AN
*/ Y'~&%|9+T
public void sort(int[] data) { c,fedH;
MaxHeap h=new MaxHeap(); ;C<A}
h.init(data); n)H0;25L
for(int i=0;i h.remove(); )K6{_~Kc\
System.arraycopy(h.queue,1,data,0,data.length); '[E_7$d
} xr2:bu
}<S2W\,G
private static class MaxHeap{ #lC{R^SL
x M[#Ah)
void init(int[] data){ \* #4
this.queue=new int[data.length+1]; .KSGma6]
for(int i=0;i queue[++size]=data; *Wau7
fixUp(size); M:$nL
} }.vy|^X
} s#fmGe"8
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private int size=0; X[ (J!"+
]]ZBG<#
private int[] queue; 5~F0'tb|}
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public int get() { f*~fslY,o
return queue[1]; Ye6O!,R
} *~L]n4-
t*#&y:RG
public void remove() { `!8Z"xD
SortUtil.swap(queue,1,size--); mx4*zj
fixDown(1); <i6MbCB
} ]>o2P cb;
file://fixdown 3Cl9,Z"&6$
private void fixDown(int k) { Uf<vw3
int j; 8(;i~f:bCW
while ((j = k << 1) <= size) { 9 JtG&^*
if (j < size %26amp;%26amp; queue[j] j++; OXB-.<
if (queue[k]>queue[j]) file://不用交换 !/zj7z !
break; B" z5j
SortUtil.swap(queue,j,k); hH/O2
k = j; PsnU5f)`
} C=cTj7Ub
} ~] 2R+
private void fixUp(int k) { CQ[-Cp7
while (k > 1) { ~dLZ[6Z
int j = k >> 1; J5T#}!f
if (queue[j]>queue[k]) BxU1Q&
break; (ce NVo&
SortUtil.swap(queue,j,k); zJ`(LnV
k = j; xW4+)F5P(
} Fm':sd)'X
} dFFqs&cQ
QR'g*Bro
} kDh(~nfj
+GS=zNw#
} z;fSd
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SortUtil： lz 6 Aj
A~V\r<N j
package org.rut.util.algorithm; '[^2uQc
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import org.rut.util.algorithm.support.BubbleSort; }C1wfZ~F~
import org.rut.util.algorithm.support.HeapSort; 88j ;7
import org.rut.util.algorithm.support.ImprovedMergeSort; CK</2w+
import org.rut.util.algorithm.support.ImprovedQuickSort; B;r$( 'UZ
import org.rut.util.algorithm.support.InsertSort; yFo5pKF.J
import org.rut.util.algorithm.support.MergeSort; eHe /w9`$R
import org.rut.util.algorithm.support.QuickSort; `qz5rPyZ
import org.rut.util.algorithm.support.SelectionSort; {eEWfMKIn
import org.rut.util.algorithm.support.ShellSort; Hrnql
j.}V~Sp*
/** Nk4_!
* @author treeroot UD`Z;F
* @since 2006-2-2 |/;5| z
* @version 1.0 4?&a?*M
*/ M3 u8NRd5|
public class SortUtil { %U7f9
public final static int INSERT = 1; 4/WCs$
public final static int BUBBLE = 2; 55b |zf
public final static int SELECTION = 3; E|
public final static int SHELL = 4; e~;)-Z
public final static int QUICK = 5; L?+|%[
public final static int IMPROVED_QUICK = 6; #>B1$(@
public final static int MERGE = 7; pH%c7X/[3L
public final static int IMPROVED_MERGE = 8; ;i:wY&
public final static int HEAP = 9; Zr;=p"cXr
Y{|yB
public static void sort(int[] data) { q:EQ,
sort(data, IMPROVED_QUICK); ^)l@7XxD
} eE%yo3
private static String[] name={ ueBoSZRWX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4>C=:w
}; E}/|Lja
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private static Sort[] impl=new Sort[]{ QvN <uxm
new InsertSort(), L0 2~FT
new BubbleSort(), 7=A9E]:
new SelectionSort(), {Y%=/ba W
new ShellSort(), F|`B2Gr
new QuickSort(), [#'_@zZz
new ImprovedQuickSort(), Qmx~_
new MergeSort(), G5J ZB7C
new ImprovedMergeSort(), [+,U0OV,
new HeapSort() IFofFXv_
}; G3^]Wwu
rxp9B>~
public static String toString(int algorithm){ Q]UYG(
return name[algorithm-1]; f+Li'?
} `Kw8rG\]:
VDjIs UUX
public static void sort(int[] data, int algorithm) { +/86w59
impl[algorithm-1].sort(data); 1|w:xG^
} ?Hxgx
q.[[c
public static interface Sort { A!Ct,%
public void sort(int[] data); k]9>V@C
} *js$r+4
W?J[K;<
public static void swap(int[] data, int i, int j) { G$9|aaf`1#
int temp = data; Z*)Y:tk)b
data = data[j]; W<]Oo]
data[j] = temp; pbxcsA\
} Lj-&TO}OZ
} aq/Y}s?