[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; ]4[%Sv6]G
} 2#^g] o-N
int i1=l; `JiWS
int i2=mid+1; =Hd#"9-
for(int cur=l;cur<=r;cur++){ 0KgP'oWvY
if(i1==mid+1) V?G%-+^
data[cur]=temp[i2++]; E' `;
else if(i2>r) yn]Sc<uK
data[cur]=temp[i1++]; Lhux~,EH
else if(temp[i1] data[cur]=temp[i1++]; pKq[F*Lut
else 4XER7c
data[cur]=temp[i2++]; 1?|"33\03R
} oNPvksdC;
} P)f8lU^z
g&F$hm
} Q"{Dijc%
.$}z</#!
改进后的归并排序: 2/V%jS[4#y
|T/OOIA=sI
package org.rut.util.algorithm.support; a5ZXrWv
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import org.rut.util.algorithm.SortUtil; H.;}%id
3ddw'b'aQ
/** Wj|W B*B
* @author treeroot =0EKrG
* @since 2006-2-2 O9By5j 4
* @version 1.0 VPT?z
*/ wS9V@
public class ImprovedMergeSort implements SortUtil.Sort { rYdNn0mhk
"xTVu57Z[
private static final int THRESHOLD = 10; TS+jDs
yBs-bp"-
/* WLj]EsA.
* (non-Javadoc) [@VzpVhXz
* G[ #R1'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SS`\_@ci
*/ )mOM!I7D@
public void sort(int[] data) { ^1Fzs(#.
int[] temp=new int[data.length]; W&9qgbO]
mergeSort(data,temp,0,data.length-1); _p1!8*0]
} -['& aey}a
WZ,k][~
private void mergeSort(int[] data, int[] temp, int l, int r) { Yq|_6zbYf
int i, j, k; d-Z2-89K
int mid = (l + r) / 2; +VW8{=$
if (l == r) jG{?>^
return; 08^f|K
if ((mid - l) >= THRESHOLD) `!I/6d?A
mergeSort(data, temp, l, mid); dz/@]a
else 1DAU*^-
insertSort(data, l, mid - l + 1); *`w>\},su
if ((r - mid) > THRESHOLD) d{NMG)`x\
mergeSort(data, temp, mid + 1, r); S WTZ6(!oW
else %SIll
insertSort(data, mid + 1, r - mid); ?K2EK'-q
t~K[`=G\ex
for (i = l; i <= mid; i++) { 5ta;CG
temp = data; BI,]pf;GWv
} 9RJ#zUK
for (j = 1; j <= r - mid; j++) { oVHe<zE.
temp[r - j + 1] = data[j + mid]; `G:1
} ~:Z|\a58j
int a = temp[l]; NV/paoyx:*
int b = temp[r]; iOv>g-t:
for (i = l, j = r, k = l; k <= r; k++) { =e#h;x2
if (a < b) { \Q}Y"oq
data[k] = temp[i++]; "wZvr}xk
a = temp; s=jH1^
} else { #P}n+w_@
data[k] = temp[j--]; ?d?.&nt
b = temp[j]; &P}t<;
} .K4)#oC
} w<!,mL5 N
} QwG_-
ZEDvY=@a
/** q+8de_"]
* @param data ~Y~M}4
* @param l aizws[C
* @param i }[!=O+gO
*/ 0%&}wUjV
private void insertSort(int[] data, int start, int len) { )XSHKPTQ1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T&6>Eb0{
} T'lycc4~a
} SOsz=bVx
} (m!kg
} uc"%uc'
Ue;Z)}
堆排序： (r?hD*2r
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package org.rut.util.algorithm.support; H6nH
Y$,~"$su|
import org.rut.util.algorithm.SortUtil; v36Z*I6)5
x4LPrF1
/** ^b5+A6?
* @author treeroot Io IhQ
* @since 2006-2-2 8,h!&9
* @version 1.0 29Gel
*/ +Z_VF30pa
public class HeapSort implements SortUtil.Sort{ alzdYiGf
tXrKC
/* (non-Javadoc) 7;TMxO=bra
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,37<FXX,
*/ =c,7uB
public void sort(int[] data) { W58?t6! =
MaxHeap h=new MaxHeap(); l*wGKg"x3
h.init(data); I<<1mEk
for(int i=0;i h.remove(); *K?UWi#$
System.arraycopy(h.queue,1,data,0,data.length); d:A'|;']
} 2x|FVp
:'q$emtY
private static class MaxHeap{ 4/*@cW
|%XcI3@*
void init(int[] data){ }JQy&V%
this.queue=new int[data.length+1]; b[:m[^
for(int i=0;i queue[++size]=data; 7p!f+\kM
fixUp(size); C`qV+pV
} JURu>-i
} l9j=;h
s 8K.A~5 w
private int size=0; F"M/gy
jp4-w(
private int[] queue; Z 369<
G"(aoy, co
public int get() { W<^t2j'
return queue[1]; *6u2c%^
} znWB.H
/!>OWh*~
public void remove() { 4IY|<
SortUtil.swap(queue,1,size--); ]3 GO_tL
fixDown(1); ?9eiT:2
} zNo"P[J8
file://fixdown %{V7|Azt
private void fixDown(int k) { Fo;J3<U)
int j; yoe@]c=
while ((j = k << 1) <= size) { =5^1Bl
if (j < size %26amp;%26amp; queue[j] j++; 2-UD^;0
if (queue[k]>queue[j]) file://不用交换 $g VbeQ
break; >;j&]]-&
SortUtil.swap(queue,j,k); W79.Nj2`
k = j; |${ImP
} :6(@P1vA 6
} 47{5{/B-
private void fixUp(int k) { "D4% A!i
while (k > 1) { (s|WmSQ
int j = k >> 1; oy[ px9Wx
if (queue[j]>queue[k]) 16@<G
break; F+BCzsm7$
SortUtil.swap(queue,j,k); @}PX:*c
k = j; eAP 8!
} z"QtP[_m
} PC255
:?ZrD,D
} I!kR:Z
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} ]D,_<Kk
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SortUtil： KC:6^h'.
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package org.rut.util.algorithm; d>MDC . j
X$Q.A^9
import org.rut.util.algorithm.support.BubbleSort; U6H3T0#
import org.rut.util.algorithm.support.HeapSort; /f oI.S
import org.rut.util.algorithm.support.ImprovedMergeSort; D(<0tU^[
import org.rut.util.algorithm.support.ImprovedQuickSort; W)o*$cu
import org.rut.util.algorithm.support.InsertSort; hG<[F@d
import org.rut.util.algorithm.support.MergeSort; -nUK%a"(D
import org.rut.util.algorithm.support.QuickSort; b-@9Xjv
import org.rut.util.algorithm.support.SelectionSort; Lq.2vfA>
import org.rut.util.algorithm.support.ShellSort; 14uv[z6
f2Xn!]o
/** ~@@$-,}X
* @author treeroot @6R6.i5d
* @since 2006-2-2 p9\*n5{
* @version 1.0 IW@phKz
*/ x11riK
public class SortUtil { pz/W#VN
public final static int INSERT = 1; !v%>W< 3Q
public final static int BUBBLE = 2; G8?Do+[
public final static int SELECTION = 3; 8 ?y|
public final static int SHELL = 4; #v~dhx=R
public final static int QUICK = 5; &dni6E4
public final static int IMPROVED_QUICK = 6; q;sZwp<
public final static int MERGE = 7; UpSJ%%.n
public final static int IMPROVED_MERGE = 8; !5[SNr3^
public final static int HEAP = 9; /$\8?<Pc".
z"7X.*]
public static void sort(int[] data) { {0/2Hw n
sort(data, IMPROVED_QUICK); 8gt*`]I
} &e*@:5Z:k
private static String[] name={ S&[9Vb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" glROT@
}; ij3W8i9'
^liW*F"UY
private static Sort[] impl=new Sort[]{ $II~tO
new InsertSort(), )~nieQEZQ
new BubbleSort(), {wz_ngQ
new SelectionSort(), EDnZ/)6Gg
new ShellSort(), fF#Fc&B
new QuickSort(), 5X5UUdTM
new ImprovedQuickSort(), "j8=%J{
new MergeSort(), l1L8a I,8
new ImprovedMergeSort(), Cv*K.T
new HeapSort() ^Ojg}'.Ygv
}; `pDTjJ
+`V<& Y-5l
public static String toString(int algorithm){ '+g[n
return name[algorithm-1]; v&]yzl
} ~>0H k}Hv
i tk/1
public static void sort(int[] data, int algorithm) { ?0JNaf
impl[algorithm-1].sort(data); [^/a`Kda8
} 2_M+o]Z^
}o[<1+W(.
public static interface Sort { SwO$UqYU=
public void sort(int[] data); CS-jDok
} Ar?ZUASJ
_T8S4s8q
public static void swap(int[] data, int i, int j) { Wy-y-wi:p
int temp = data; ;<b7kepR
data = data[j]; C#)T$wl[E
data[j] = temp; @k'V`ZQF
} ^f"|<r
} kG}F/GN?