[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; (=tu~ ^
} 9}11>X
int i1=l; deutY.7g
int i2=mid+1; DjiWg(X
for(int cur=l;cur<=r;cur++){ LhKUZX,P8
if(i1==mid+1) q/3co86c
data[cur]=temp[i2++]; lp5b&I_
else if(i2>r) u6/;=]0
data[cur]=temp[i1++]; z2SR/[I?
else if(temp[i1] data[cur]=temp[i1++]; liTAV9<
else ?$4CgN-
data[cur]=temp[i2++]; ,>I_2mc
} SqT+rvTh
} L%f$ &
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} `Ro>?H
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改进后的归并排序: [Mlmn$it
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package org.rut.util.algorithm.support; zfUkHL6
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import org.rut.util.algorithm.SortUtil; &3Mps[u:h
l78:.
/** Wr.~Ns<
* @author treeroot [,mcvO;
* @since 2006-2-2 ,CnUQx0
* @version 1.0 S3YAc4
*/ KnYHjJa
public class ImprovedMergeSort implements SortUtil.Sort { 9!Vp-bo
%(kf#[zQ
private static final int THRESHOLD = 10; +F6R@@rWr
0"=}d y
/* QEl~uhc3
* (non-Javadoc) H3qL&xL
* :,=Z)e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &/lmg!6
*/ /M~rmIks
public void sort(int[] data) { p2o66t
int[] temp=new int[data.length]; D{s4Bo-
mergeSort(data,temp,0,data.length-1); 3S1`av(tD
} +4Lj}8,
*wJ'Z4_5F
private void mergeSort(int[] data, int[] temp, int l, int r) { 2N_9S?a3sK
int i, j, k; |}K7Q
int mid = (l + r) / 2; `H\NJ,
if (l == r) \fD[Ej
return; r#K"d
if ((mid - l) >= THRESHOLD) 58_aI?~>>
mergeSort(data, temp, l, mid); ki|w?0s
else 7)au#K6
insertSort(data, l, mid - l + 1); BGVy \F<
if ((r - mid) > THRESHOLD) iMOf];O)
mergeSort(data, temp, mid + 1, r); TZk.h8
else lpeo^Y}N
insertSort(data, mid + 1, r - mid); >.#tNFAs
CI,xp
for (i = l; i <= mid; i++) { Q*AgFF%wn
temp = data; T 9?!.o
} VEg/x z4c
for (j = 1; j <= r - mid; j++) { @5(HRd
temp[r - j + 1] = data[j + mid]; 78<QNlKn
} &0S/]E`_M
int a = temp[l]; -qRO}EF
int b = temp[r]; ;:pd/\<
for (i = l, j = r, k = l; k <= r; k++) { ;={Z Bx
if (a < b) { WWYG>C[
data[k] = temp[i++]; 9<I;9.1S?^
a = temp; _7w2E
} else { yj{:%Km:`
data[k] = temp[j--]; 98eS f
b = temp[j]; MHKB:t]hA
} Gu9x4p
} )d-{#
} -2Azpeh
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/** %epK-q9[
* @param data ZI#Xh5
* @param l dbLxm!;(
* @param i I UxsvW+
*/ b(H)8#C
private void insertSort(int[] data, int start, int len) { q! U'DDEP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7?JcB?G4
} }D eW2Jp
} j>OB<4?.+
} /I&b5Vp
} =Z(#j5TGvH
iP~dH/B|v
堆排序： 15FGlO<<
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package org.rut.util.algorithm.support; ,W/D0
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import org.rut.util.algorithm.SortUtil; /1q] D8
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/** Z;JZ<vEt92
* @author treeroot 9#@CmiIhy
* @since 2006-2-2 vXM``|
* @version 1.0 3M&75OE
*/ L&nGjC+Lr
public class HeapSort implements SortUtil.Sort{ >, }m=X8
K06/ D!RD4
/* (non-Javadoc) yw;!KUKb|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ".SQ*'Oc
*/ 6Pa jBEF
public void sort(int[] data) { QP e}rQnm
MaxHeap h=new MaxHeap(); \;A\ vQ[
h.init(data); D0&{iZ(
for(int i=0;i h.remove(); z[wk-a+w
System.arraycopy(h.queue,1,data,0,data.length); ai,Mez
} ]jzINaMav
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private static class MaxHeap{ gZs8BKO
(7rG~d1iS
void init(int[] data){ lFY;O !Y5\
this.queue=new int[data.length+1]; f V.(v&
for(int i=0;i queue[++size]=data; wFaWLC|&
fixUp(size); N7xkkAS{
} JZQ$*K
} ^OQ#Nz
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private int size=0; 8Q1){M9'
:8aIj_qds
private int[] queue; K9*#H(
.W&rcqy
public int get() { <ZNa`
return queue[1]; m H'jr$ ?
} STmCj
+:[dviyPt
public void remove() { ca_8S8lv
SortUtil.swap(queue,1,size--); UmU=3et<Wj
fixDown(1); y*6r&989
} :LFwJ
file://fixdown |C S[>0mV!
private void fixDown(int k) { <u"#Jw/VP
int j; yREO;m|o
while ((j = k << 1) <= size) { n6nwda
if (j < size %26amp;%26amp; queue[j] j++; c"J(? 1O
if (queue[k]>queue[j]) file://不用交换 %;PPu$8K9
break; b`K~l'8
SortUtil.swap(queue,j,k); T+2I:W%
k = j; RS/%uxS?
} Nu{RF
} f|FQd3o)
private void fixUp(int k) { _wf"E(c3D
while (k > 1) { 9bXU!l[
int j = k >> 1; }~-)31e'`
if (queue[j]>queue[k]) \'"q6y
break; -zz9k=q
SortUtil.swap(queue,j,k); ][bz5aV
k = j; _ #l b\
} );;UNO21+
} j&Ayk*
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} (s{%XB:K
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} -ij1%#tz
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SortUtil： Ye!=
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package org.rut.util.algorithm; Hv0sl+
p9_45u`u2
import org.rut.util.algorithm.support.BubbleSort; ASy7")5
import org.rut.util.algorithm.support.HeapSort; zAB-kE\)
import org.rut.util.algorithm.support.ImprovedMergeSort; [;5HI'px
import org.rut.util.algorithm.support.ImprovedQuickSort; qg6Hk:^r
import org.rut.util.algorithm.support.InsertSort; 7!JoP?!
import org.rut.util.algorithm.support.MergeSort; h2aJa@;S
import org.rut.util.algorithm.support.QuickSort; Ok({Al1A,w
import org.rut.util.algorithm.support.SelectionSort; 60AX2-sdJ,
import org.rut.util.algorithm.support.ShellSort; ~rY<y%K
wQnr*kyza
/** K{>O.5
* @author treeroot ^"+cJ)
* @since 2006-2-2 AD?^.<
* @version 1.0 dGh<R|U3
*/ 5'V'~Q%
public class SortUtil { r?/>t1Z
public final static int INSERT = 1; HNjkRl)QR
public final static int BUBBLE = 2; 2 >xV&
public final static int SELECTION = 3; TJsT .DWW~
public final static int SHELL = 4; 9f,HjRP
public final static int QUICK = 5; E4y"$U%.
public final static int IMPROVED_QUICK = 6; ! 2Y, a
public final static int MERGE = 7; l/rhA6kEU
public final static int IMPROVED_MERGE = 8; gYzKUX@
public final static int HEAP = 9; 9fl !CG
{Y'_QW1:2
public static void sort(int[] data) { YN>#zr+~
sort(data, IMPROVED_QUICK); ?QVD)JI*k
} /e{Oqhf[n
private static String[] name={ ( v ~/glf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z^GriL
}; A7b7IM[
)cs y^-qw
private static Sort[] impl=new Sort[]{ QTn-n)AE
new InsertSort(), KI>7h.t
new BubbleSort(), sCRBKCR?
new SelectionSort(), <U,T*Ql1x
new ShellSort(), s^KxAw_IV
new QuickSort(), |+`hSA
new ImprovedQuickSort(), W+K=M*^D;c
new MergeSort(), &*)tqQeQf
new ImprovedMergeSort(), BTd'bD~EA
new HeapSort() LK:|~UV?
}; 6gR=e+
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public static String toString(int algorithm){ Y?%6af+
return name[algorithm-1]; @MB;Ez v
} >9u6@
5E!|-xD
public static void sort(int[] data, int algorithm) { ^jmnE.8R
impl[algorithm-1].sort(data); / V{w<
} 0U/:Tpyr
*iC t4J
public static interface Sort { B-&J]H
public void sort(int[] data); Cq(Xa-
} Y6D=tb
ryn)
public static void swap(int[] data, int i, int j) { RXWjFv~/
int temp = data; e&0B4wVAQ
data = data[j]; zw5~|<
data[j] = temp; Le3S;SY&
} Aoo'i
} WX\%FJ