[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; BS ]:w(}[
} Lrmhr3 w5
int i1=l; > `mV^QD
int i2=mid+1; 3 .K #,
for(int cur=l;cur<=r;cur++){ B#?rW*yEe
if(i1==mid+1) 'S|7<<>4k
data[cur]=temp[i2++]; dL_9/f4
else if(i2>r) M2\c0^R
data[cur]=temp[i1++]; I E{:{b\
else if(temp[i1] data[cur]=temp[i1++]; ^#IE t#
else jYvl-2A'
data[cur]=temp[i2++]; Z1Qv>@u
} 4;Vi@(G)
} vCXmu_S4^>
V(8,94vm
} j^WYMr,
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改进后的归并排序: `F]
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package org.rut.util.algorithm.support; |3^U\r^zo
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import org.rut.util.algorithm.SortUtil; N.0g%0A.D
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/** mZM,"Wq,
* @author treeroot Kr[oP3
* @since 2006-2-2 s4QCun~m
* @version 1.0 4H NaE{O4
*/ /4N?v. jf
public class ImprovedMergeSort implements SortUtil.Sort { hiEYIx
mkhWbzD'S
private static final int THRESHOLD = 10; @;x*~0GZ
0X4)=sJP
/* 3y,2RernK
* (non-Javadoc) slhMvHOk-
* ?rA3<j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eg8b|!-')8
*/ c&N;r|N
public void sort(int[] data) { IRueq @4
int[] temp=new int[data.length]; g5RH:]DV
mergeSort(data,temp,0,data.length-1); tfu`_6
} }+Q4s]
s;..a&C'
private void mergeSort(int[] data, int[] temp, int l, int r) { oe|8
int i, j, k; b(CO7/e>
int mid = (l + r) / 2; xcn~KF8
if (l == r) $VB dd~f
return; )2#&l
if ((mid - l) >= THRESHOLD) 2r;h">
mergeSort(data, temp, l, mid); ca3SE^
else _aBy>=2c$
insertSort(data, l, mid - l + 1); u!&T}i:
if ((r - mid) > THRESHOLD) RRpY%-8M
mergeSort(data, temp, mid + 1, r); \yZVn6GVr
else hlZ{bO'f
insertSort(data, mid + 1, r - mid); IC(:RtJ
H XFY
for (i = l; i <= mid; i++) { jm@,Ihz=wI
temp = data; ];"40/X
} l($8HAJ
for (j = 1; j <= r - mid; j++) { R\XS5HOE(
temp[r - j + 1] = data[j + mid]; P3n#s2o6y
} "}#%h&,
int a = temp[l]; \*'@F+
int b = temp[r]; Kn<+Au_]L
for (i = l, j = r, k = l; k <= r; k++) { Z4c'1-lh
if (a < b) { /qMnIo
data[k] = temp[i++]; KeRC8mYp
a = temp; xm1'
} else { #"lb9._M
data[k] = temp[j--]; /!^,+
b = temp[j]; *^Ges;5$"
} 9#m3<oSJ
} TET=>6
} ?Z_T3/ f
Kh[l};/F
/** ~,E }^
* @param data l U8pX$
* @param l LMx/0
* @param i $v[mIR
*/ S89j:KRXH%
private void insertSort(int[] data, int start, int len) { 3 o$zT9j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +RJKJ:W
} WJu(,zM?G
} 5S2 j5M00
} ]z5hTY
} rMHh!)^#W
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堆排序： d(TN(6g@
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package org.rut.util.algorithm.support; h#KSKKNW
bmK
import org.rut.util.algorithm.SortUtil; 4L ]4WVc
`GW&*[.7
/** |59)6/i
* @author treeroot |JF,n~n
* @since 2006-2-2 *4NY"EwjN
* @version 1.0 0ju-l=w
*/ > Xh=P%
public class HeapSort implements SortUtil.Sort{ jex\5
WW{_D
/* (non-Javadoc) '*65j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dKCl#~LAI'
*/ s~2o<#
public void sort(int[] data) { 7<*0fy5nn
MaxHeap h=new MaxHeap(); _z8"r&
h.init(data); VFx[{Hy
for(int i=0;i h.remove(); li v=q
System.arraycopy(h.queue,1,data,0,data.length); CHZ/@gc
} |>.MH
@'):rFr@F
private static class MaxHeap{ 3<"j/9;K'
@&`^#pok
void init(int[] data){ OylUuYy~j
this.queue=new int[data.length+1]; yj#FO'UY
for(int i=0;i queue[++size]=data; ZS4dW_*[
fixUp(size); )B"{B1(
} 2uN3:_w
} DbLo{mFEIj
bGL}nPo
private int size=0; J`)/\9'&&
H"(#Tp ZTE
private int[] queue; O8b#'f~
cW_wIy\]&
public int get() { i%.k{MY
return queue[1]; f=}T^Z<
} ymqv@Byi8A
%K')_NS@
public void remove() { n44 T4q
SortUtil.swap(queue,1,size--); EyVu-4L:#
fixDown(1); a>W++8t1 ;
} Md@x2Ja
file://fixdown S|)atJJ0G"
private void fixDown(int k) { 3@\/5I xn
int j; *#b e
while ((j = k << 1) <= size) { @vyEN.K%mm
if (j < size %26amp;%26amp; queue[j] j++; 8 yi#] 5`Q
if (queue[k]>queue[j]) file://不用交换 dm[cl~[ Q
break; b@8z+,_
SortUtil.swap(queue,j,k); R:&y@/JY8[
k = j; ]xMZo){[|
} z9 Ch %A{
} ~cSXBc,+
private void fixUp(int k) { du$M
while (k > 1) { ,7bhUE/VB
int j = k >> 1; M1Ff ,]w
if (queue[j]>queue[k]) ,cS#
break; &'&)E((
SortUtil.swap(queue,j,k); }xt^}:D
k = j; mj e9i
} s|A[HQUtJ
} iY$iL<
E56
} 6'kQ(r>
0$c(<+D
} ut\X{.r7
B!,&{[D
SortUtil： Nv.
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package org.rut.util.algorithm; #<"od'{U
d]E={}qo&
import org.rut.util.algorithm.support.BubbleSort; i6k6l%
import org.rut.util.algorithm.support.HeapSort; ^*`#+*C
import org.rut.util.algorithm.support.ImprovedMergeSort; XXn3K BIf
import org.rut.util.algorithm.support.ImprovedQuickSort; xtD(tiqh.;
import org.rut.util.algorithm.support.InsertSort; \P+^BG!
import org.rut.util.algorithm.support.MergeSort; ] &"`
import org.rut.util.algorithm.support.QuickSort; }(!Uq
import org.rut.util.algorithm.support.SelectionSort; HQ9tvSc
import org.rut.util.algorithm.support.ShellSort; 2"Wq=qy\J
gAorb\iJ
/** Z;a)P.l.>
* @author treeroot F7O*%y.';
* @since 2006-2-2 4]m{^z`1
* @version 1.0 M^Z=~512g
*/ !KOa'Ic$V
public class SortUtil { e,p*R?Y{[
public final static int INSERT = 1; [(_,\:L${
public final static int BUBBLE = 2; ,)*[Xa_n
public final static int SELECTION = 3; )uOtQ0
public final static int SHELL = 4; PkyX,mr#1
public final static int QUICK = 5; i&lW&]
public final static int IMPROVED_QUICK = 6; 68h1Wjg:"!
public final static int MERGE = 7; Mz(?_7
public final static int IMPROVED_MERGE = 8; zEO~mJzo
public final static int HEAP = 9; '+{yg+#/wV
{ "Cu)AFy
public static void sort(int[] data) { Hy\q{
sort(data, IMPROVED_QUICK); `.O$RwC&7B
} *9r(lmrfj
private static String[] name={ kP[fhOpn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G\MeJSt*
}; K;"oK
0LL65[
private static Sort[] impl=new Sort[]{ HP_h!pvx
new InsertSort(), )e'F[
new BubbleSort(), 7glf?oE
new SelectionSort(), ^`lrKk
new ShellSort(), }JST(d&
new QuickSort(), <";1[A%7<
new ImprovedQuickSort(), 0Yq_B+IC
new MergeSort(), eL"'-d+]
new ImprovedMergeSort(), _F[a2PE2+
new HeapSort() 1G12FV>M
}; @fmp2!?6
i0wBZ i?
public static String toString(int algorithm){ @d~]3T
return name[algorithm-1]; :Ob^b3<t
} u9v,B$S
zLe(#8G
public static void sort(int[] data, int algorithm) { Z7pX%nj_
impl[algorithm-1].sort(data); 5EQ)pH+
} aWRi`poZT
@0PWbs$
public static interface Sort { ?'a>?al%>
public void sort(int[] data); u(8{5"C
} HLqN=vE6
-QJ8\/1>
public static void swap(int[] data, int i, int j) { NY<qoV
int temp = data; ktynIN
data = data[j]; ca3zY|Oo
data[j] = temp; BaI-ve
} oKGF'y?A>
} Ru#pJb(R