[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; 9sE>K)
} 7*`ldao~
int i1=l; O=mGL
int i2=mid+1; UBC[5E$
for(int cur=l;cur<=r;cur++){ dc?Yk3(Y
if(i1==mid+1) wEDU*}~
data[cur]=temp[i2++]; -h.YQC`
else if(i2>r) B0R[f
data[cur]=temp[i1++]; WUa-hm2:
else if(temp[i1] data[cur]=temp[i1++]; Brpin
else AQ0L9?
data[cur]=temp[i2++]; &S|laqH
} JHO9d:{-
} 2d3wQ)2
SxH}/I|W
} 9m6w.:S
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改进后的归并排序: #Wc)wL-Tg
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package org.rut.util.algorithm.support; 3`e1:`Hu
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import org.rut.util.algorithm.SortUtil; }qlz^s
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/** R [uo:.
* @author treeroot ~Kb(`Px@
* @since 2006-2-2 HPpnw]_
* @version 1.0 K}Z'!+<U
*/ 9Hc#[Ml
public class ImprovedMergeSort implements SortUtil.Sort { 9MXauTKI
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private static final int THRESHOLD = 10; w[|!$J?
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/* 'GW@P
* (non-Javadoc) ekAGzu
* RNt3az
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "+XO[WGc
*/ +ubO-A?
public void sort(int[] data) { 9f"6Jw@F
int[] temp=new int[data.length]; j:sac*6m
mergeSort(data,temp,0,data.length-1); nK96A.B%p
} 3IJIeG>
"?S#vUS+ 2
private void mergeSort(int[] data, int[] temp, int l, int r) { qrOTb9&y
int i, j, k; {'}Ofj
int mid = (l + r) / 2; O:Z|fDQ`
if (l == r) -nd6hx
return; Viw{<VH=
if ((mid - l) >= THRESHOLD) T%]: tDa
mergeSort(data, temp, l, mid); z$YOV"N
else NKI&n]EO
insertSort(data, l, mid - l + 1); c2F`S1Nu<
if ((r - mid) > THRESHOLD) P)}:lTe
mergeSort(data, temp, mid + 1, r); UHCx}LGe
else gXfAz,
insertSort(data, mid + 1, r - mid); `o*eLLk
A!^,QRkRN
for (i = l; i <= mid; i++) { YInW)My.h
temp = data; twN(]w}Ps|
} CRqa[boU*
for (j = 1; j <= r - mid; j++) { =oHJ_
temp[r - j + 1] = data[j + mid]; };KmMpBn
} S%T1na^x
int a = temp[l]; 4a646jg)
int b = temp[r]; [%h^qJ
for (i = l, j = r, k = l; k <= r; k++) { }5S2v+zE
if (a < b) { 4Fz^[L}[
data[k] = temp[i++]; .[_&>@bmrP
a = temp; $YSOkyC?
} else { RE7[bM3a
data[k] = temp[j--]; $L`7J$'^
b = temp[j]; $qEJO=v
} -51L!x}1c
} }=L >u>cP
} uC}YKT>V7
'%~zu]f'
/** 2KzKNe(
* @param data 1R:h$*-z
* @param l <T&$1m{
* @param i kO9yei
*/ M,{F/Yu
private void insertSort(int[] data, int start, int len) { :g\qj? o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d6n6= [*
} S_WY91r
} oC?b]tzj
} #?,cYh+
} ']rh0?
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堆排序： =kCpCpET
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package org.rut.util.algorithm.support; &$YmY
o^NQ]BdH8
import org.rut.util.algorithm.SortUtil; rms&U)?
[AGm%o=)
/** REsThB
* @author treeroot " DFg"
* @since 2006-2-2 fklMYu4:n
* @version 1.0 [n^___7
*/ npe*A
public class HeapSort implements SortUtil.Sort{ LTCjw_<7
mR{0*<
/* (non-Javadoc) k |Lm;g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c8Opc"UE
*/ nDo|^{!L`
public void sort(int[] data) { <0vvlOL5
MaxHeap h=new MaxHeap(); QJTC@o
h.init(data); Zsuh8t
for(int i=0;i h.remove(); pp-Ur?PM
System.arraycopy(h.queue,1,data,0,data.length); [Q*kom :
} J|b1 K]
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private static class MaxHeap{ *GDU=D}
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void init(int[] data){ /bb4nM_E/
this.queue=new int[data.length+1]; {.2C>p
for(int i=0;i queue[++size]=data; WU$:n
fixUp(size); \\T I4A^#
} p 2i5/Ly
} b9vKux
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private int size=0; o4J K$%
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private int[] queue; zz9.OnZ~
Vy?w,E0^:
public int get() { ?+!KucTF
return queue[1]; W)"q9(T?%
} C&SYmYj^c
HR}c9wy,q\
public void remove() { AsLAm#zq
SortUtil.swap(queue,1,size--); Du{]r[[C
fixDown(1); N;w1f"V}
} 8sIGJ|ku
file://fixdown Gmwn:
private void fixDown(int k) { `rcjZ^n
int j; (5I]umtge
while ((j = k << 1) <= size) { m1<B6*iG"
if (j < size %26amp;%26amp; queue[j] j++; );6zV_^!
if (queue[k]>queue[j]) file://不用交换 3646.i[D
break; Y'Af I^K
SortUtil.swap(queue,j,k); #8RQ7|7b|
k = j; &@Q3CCDS
} f+1]#"9i|
} V*AG0@&!
private void fixUp(int k) { eMF%!qUr
while (k > 1) { `b2I)xC#
int j = k >> 1; ALG #)$|
if (queue[j]>queue[k]) }cP3i
break; +j<Nu)0iY
SortUtil.swap(queue,j,k); g&za/F
k = j; ;aF / <r
} ,aN/``j=
} S*]IR"YL
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} QVP $e`4
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} QA%GK4F70
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SortUtil： toCN{[
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package org.rut.util.algorithm; %mq]M
e*g; +nz
import org.rut.util.algorithm.support.BubbleSort; igp4[Hj
import org.rut.util.algorithm.support.HeapSort; ,Bta)
import org.rut.util.algorithm.support.ImprovedMergeSort; ZNUV Bi
import org.rut.util.algorithm.support.ImprovedQuickSort; 0>'1|8+`(z
import org.rut.util.algorithm.support.InsertSort; YcGqT2oLP
import org.rut.util.algorithm.support.MergeSort; =thgNMDm"
import org.rut.util.algorithm.support.QuickSort; tQ)8HVKF
import org.rut.util.algorithm.support.SelectionSort; zso.?`85
import org.rut.util.algorithm.support.ShellSort; ^qDkSoqC"
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/** _zOzHc?Q
* @author treeroot /Ly%-py-$
* @since 2006-2-2 ctCfLlK
* @version 1.0 Rub""Ga
*/ v-l):TL+=
public class SortUtil { DB*IVg
public final static int INSERT = 1; %0]&o, w{
public final static int BUBBLE = 2; [$V_qFv{
public final static int SELECTION = 3; I8[G!u71)_
public final static int SHELL = 4; 6zDJdE'Es
public final static int QUICK = 5; FVSz[n
public final static int IMPROVED_QUICK = 6; 8Yj(/S3y
public final static int MERGE = 7; <Ei|:m
public final static int IMPROVED_MERGE = 8; We9mkwK7C
public final static int HEAP = 9; fEpY3od
ja:%j&:
public static void sort(int[] data) { p#?1l/f"
sort(data, IMPROVED_QUICK); Zj},VB*T
} X{ Nif G
private static String[] name={ <1@_MYo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GJW1|Fk
}; E:i3 /Ep?
KctD=6
private static Sort[] impl=new Sort[]{ ^C'k.pV n~
new InsertSort(), 'rg$%M*(
new BubbleSort(), 9<Bf5d
new SelectionSort(), S`R ( _eD@
new ShellSort(), x3vz4m[
new QuickSort(), ou(9Qf zN
new ImprovedQuickSort(), C[pAa8
new MergeSort(), }&!rIU
new ImprovedMergeSort(), r)b`3=
new HeapSort() nyMA%9,B
}; >#kzPYsp
eAl&[_o|S
public static String toString(int algorithm){ #fFEo)YG
return name[algorithm-1]; R sujKh/
} 7?A}qmv
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public static void sort(int[] data, int algorithm) { 8en85 pp8P
impl[algorithm-1].sort(data); b'ew Od=
} xF,J[Aj
C ]#R7G
public static interface Sort { ];< [Cln%
public void sort(int[] data); YZoH{p9f
} FV^kOz
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public static void swap(int[] data, int i, int j) { doe[f_\
int temp = data; ]=pEs6%O3
data = data[j]; U%KoG-#
data[j] = temp; 8gx^e./
} `j<'*v zo
} E-Mp|y/V