[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; r~t7Z+PXF
} W_EN4p~J
int i1=l; )$i3j 1[;
int i2=mid+1; _!D$Aj
for(int cur=l;cur<=r;cur++){ Ky|0IKE8Z
if(i1==mid+1) |szfup~5es
data[cur]=temp[i2++]; P&VI2k
else if(i2>r) Y]Q*I\X
data[cur]=temp[i1++]; ~>|U%3}]
else if(temp[i1] data[cur]=temp[i1++]; "/=xu|
else WBdb[N6\
data[cur]=temp[i2++]; VP&lWPA}\$
} ShP V!$0
} TjdYCk]'
fE iEy%o
} h:wD &Fh8
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改进后的归并排序: M`FL&Ac
GKr L
package org.rut.util.algorithm.support; C09@2M'
5=\b+<pE
import org.rut.util.algorithm.SortUtil; &~EOM
:Vc9||k
/** FS0SGBo
* @author treeroot V7<} ;Lzm
* @since 2006-2-2 7y&`H
* @version 1.0 %,BJkNV
*/ t/w>t! q
public class ImprovedMergeSort implements SortUtil.Sort { :#vrNg(M
e$Ej7_.#;
private static final int THRESHOLD = 10; 4!wfh)Z
Wj0([n
/* 4k8 @u
* (non-Javadoc) UF tTt`N2
* xe'*%3-v)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M'sJ5;^5
*/ u/:@+rTV_
public void sort(int[] data) { ~}fpe>M:
int[] temp=new int[data.length]; q.4DwY5 L
mergeSort(data,temp,0,data.length-1); QQJcvaQ
} FrS>.!OFn
cD]t%`*
private void mergeSort(int[] data, int[] temp, int l, int r) { "A7tb39*
int i, j, k; A'T! og|5
int mid = (l + r) / 2; <\u%ZB
if (l == r) a,.9eHf
return; y)2]:nD`B
if ((mid - l) >= THRESHOLD) 9j/B3CjW
mergeSort(data, temp, l, mid); tfO _b5g
else 9ZwhCsO
insertSort(data, l, mid - l + 1); Ru/3>n
if ((r - mid) > THRESHOLD) [&$z[/4:8c
mergeSort(data, temp, mid + 1, r); Y|",.~
else *KNR",.
insertSort(data, mid + 1, r - mid); %O-wMl
:hr%iu
for (i = l; i <= mid; i++) { 0X;Dr-3<
temp = data; xM(
} G8@%)$A
for (j = 1; j <= r - mid; j++) { F-m1GG0s
temp[r - j + 1] = data[j + mid]; e2>gQ p/
} 6xwC1V?:0t
int a = temp[l]; }0I! n@
int b = temp[r]; NW$Z}?I
for (i = l, j = r, k = l; k <= r; k++) { &Ef'5
if (a < b) { \|kU{d0
data[k] = temp[i++]; ry:tL0;;e#
a = temp; 2ma.zI@^u9
} else { /dIiFr"e}G
data[k] = temp[j--]; -<.>jX
b = temp[j]; x~ I cSt
} RSy1 wp4W
} 1'h?qv^(
} `eA0Z:`g!
?U&onGy
/** mY-r:
* @param data l`d=sOB^
* @param l 9,4a?.*4~
* @param i Bi]%bl>%
*/ iC 2:P~
private void insertSort(int[] data, int start, int len) { g\2Y605DM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7kO 1d{u6b
} <I7UyCAF
} & )Z JT.S
} 6_XTeu
} QJxcH$
~*&_zPTN
堆排序： :wMZ&xERDZ
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package org.rut.util.algorithm.support; {oO!v}]
^7=yjD`
import org.rut.util.algorithm.SortUtil; Yk }zN_v
I;=}@]9
/** p0b&CrALx
* @author treeroot uu HWN|
* @since 2006-2-2 tP`,Egf"g
* @version 1.0 P )`-cfg
*/ qRNGe8
public class HeapSort implements SortUtil.Sort{ G'!Hc6OZ
B4|3@X0(
/* (non-Javadoc) - iU7'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nfd^'}$]
*/ h.PY$W<
public void sort(int[] data) { )x]/b=m
MaxHeap h=new MaxHeap(); <[(xGrEZV
h.init(data); )U5AnL
for(int i=0;i h.remove(); 9n1O@~
System.arraycopy(h.queue,1,data,0,data.length); V<1dA\I"
} LqW~QEU(
\SyfEcSf2v
private static class MaxHeap{ nlh%O@,
?'^xO:
void init(int[] data){ 7&2xUcsz)
this.queue=new int[data.length+1]; Dzb@H$BQ7
for(int i=0;i queue[++size]=data; S);bcowf_
fixUp(size); >QCVsX>~
} n{|~x":9V
} :[!rj
r"^P>8
private int size=0; i9$ -lk
B\BP:;"
private int[] queue; yYF%U7N/n
s+,JwV?b
public int get() { NU81 V0:jG
return queue[1]; @N34 Q-l
} )%P!<|s:5
ZfoI7<?33
public void remove() { &!_>J0
SortUtil.swap(queue,1,size--); nD|Bo 9
fixDown(1); ?z p$Wz;k
} zoA]7pG-
file://fixdown 1Z|q0-Dw0
private void fixDown(int k) { 7N 7W0Ky
int j; L -<!,CASW
while ((j = k << 1) <= size) { ZxY%x/K
if (j < size %26amp;%26amp; queue[j] j++; Ee^2stc-
if (queue[k]>queue[j]) file://不用交换 XXvM*"3D5
break; 1ih|b8)Dn
SortUtil.swap(queue,j,k); y3kXfSe
k = j; 0rooL<~fa
} _>0I9.[5
} KftZ^mk+p
private void fixUp(int k) { uK1DC i
while (k > 1) { \K55|3~R
int j = k >> 1; Xbe=_9l&p
if (queue[j]>queue[k]) (6!W8x7
break; /GqW1tcO
SortUtil.swap(queue,j,k); +uLl3(ml
k = j; p{NVJ^!+
} VM88#^
} -6@#Nq_iWU
\'x.DVp
} ;X*I,g.+H
:.J Ad$>P
} =HH}E/9z
s: pmB\
SortUtil： .liVlo@
YH@p\#Y
package org.rut.util.algorithm; e+Vn@-L;
.7_<0&kW
import org.rut.util.algorithm.support.BubbleSort; 90X<Qs
import org.rut.util.algorithm.support.HeapSort; SN'j?-
import org.rut.util.algorithm.support.ImprovedMergeSort; D.su^m_1
import org.rut.util.algorithm.support.ImprovedQuickSort; R0HzNk
import org.rut.util.algorithm.support.InsertSort; )T&ZiHIJ3
import org.rut.util.algorithm.support.MergeSort; gd#+N]C_
import org.rut.util.algorithm.support.QuickSort; E.45s? r
import org.rut.util.algorithm.support.SelectionSort; `r+zNJ@q
import org.rut.util.algorithm.support.ShellSort; ~nDbWv"
0QcC5y;
/** 8Q4yllv4
* @author treeroot {S,L %
* @since 2006-2-2 NU"Ld+gw
* @version 1.0 &?"E"GH
*/ ;2*hN(
public class SortUtil { Wa.y7S0(@
public final static int INSERT = 1; sQwRlx
public final static int BUBBLE = 2; zsOOx% +
public final static int SELECTION = 3; b*Sw")#
public final static int SHELL = 4; n%X5TJE
public final static int QUICK = 5; .Yg7V'R1
public final static int IMPROVED_QUICK = 6; WCRGqSr4
public final static int MERGE = 7; =jz [}5
public final static int IMPROVED_MERGE = 8; j2^Vz{
public final static int HEAP = 9; yGj'0c::
b v5BV
public static void sort(int[] data) { 4z6kFQgu
sort(data, IMPROVED_QUICK); |q!O~<H@
} QN)EPS:y
private static String[] name={ Q!.JV.(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %1h%#/#[
}; \3q Z0
+@G#Z3;l!
private static Sort[] impl=new Sort[]{ (}*1,N!#
new InsertSort(), D6N32q@
new BubbleSort(), P.#@1_:gC
new SelectionSort(), djmd @{Djt
new ShellSort(), (_IPz)F
new QuickSort(), Z@(m.&ZRx
new ImprovedQuickSort(), ((Uw[8#2`
new MergeSort(), 7fE U5@
new ImprovedMergeSort(), ;Vv.$mI
new HeapSort() y8%QS*
}; tK7v&[cI
wjy<{I
public static String toString(int algorithm){ ]Ub"NLYV
return name[algorithm-1]; ?hBjq
} erlg\-H
YUjKOPN
public static void sort(int[] data, int algorithm) { yd|ao\'=
impl[algorithm-1].sort(data); yi.GD~69
} SR>(GQ,m0;
Ky[s&>02
public static interface Sort { (! a;}V<7
public void sort(int[] data); lq}m0}9<
} sU7fVke1
s'B$/qCkR
public static void swap(int[] data, int i, int j) { XmJ?oPr7
int temp = data; dC>[[_
data = data[j]; Xx,Rah)X3
data[j] = temp; s+0n0C
} T|k_$LH
} pgd9_'[5