[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; +8|r_z\A5a
} Wm>AR? b
int i1=l; Ng+Ge5C9
int i2=mid+1; VIg=|Oe),
for(int cur=l;cur<=r;cur++){ Mp)|5<%
if(i1==mid+1) +e( (!
data[cur]=temp[i2++]; } f+hB
else if(i2>r) ,7*-%05[\
data[cur]=temp[i1++]; ~R\U1XXyUY
else if(temp[i1] data[cur]=temp[i1++]; ]-tAgNzl%
else 5 @61=Au
data[cur]=temp[i2++]; hSfLNvK
} C^!ej"
} E K#ib
f f_| 3G
} $-;x8O]u
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改进后的归并排序: k80!!S=_>
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package org.rut.util.algorithm.support; <]kifiN#
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import org.rut.util.algorithm.SortUtil; jG~UyzWH;
V'XvwO@
/** J&jig?t
* @author treeroot z{dn
* @since 2006-2-2 9S$?2z".2
* @version 1.0 Oky9GC.a
*/ qD/FxR-!
public class ImprovedMergeSort implements SortUtil.Sort { a@U0s+V&a0
v}-jls
private static final int THRESHOLD = 10; {GM8}M~D&
SWM6+i p
/* +Y|HO[
* (non-Javadoc) *r]Mn~3
* f+Da W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8et.A
*/ TLiA>`r=
public void sort(int[] data) { B#9T6|2
int[] temp=new int[data.length]; +yYSp8>
mergeSort(data,temp,0,data.length-1); (y{nD~k
} >m&r,z
Dt8wd,B
private void mergeSort(int[] data, int[] temp, int l, int r) { 5,1q%
int i, j, k; @dp1bkU
int mid = (l + r) / 2; <u85>x
if (l == r) =| M[JPr
return; 20p/p~<
if ((mid - l) >= THRESHOLD) (8/Qt\3jv
mergeSort(data, temp, l, mid); -(YdK8
else aok,qn'j
insertSort(data, l, mid - l + 1); l#G }j^Q
if ((r - mid) > THRESHOLD) #3o]Qo[Sc
mergeSort(data, temp, mid + 1, r); 13:0%IO
else 1F_ 1bAh$
insertSort(data, mid + 1, r - mid); GDj ViAFm
9XPQ1LSx
for (i = l; i <= mid; i++) { !%_H1jk
temp = data; ua!g}m~
} h2C1'+Q{9
for (j = 1; j <= r - mid; j++) { 0kB!EJ<OdG
temp[r - j + 1] = data[j + mid]; M`kR2NCi
} ,"!P{c
int a = temp[l]; 6X.lncE@p
int b = temp[r]; !rMl" Y[
for (i = l, j = r, k = l; k <= r; k++) { 4$<-3IP,
if (a < b) { ^>fjURR
data[k] = temp[i++]; 7,N>u8cTh
a = temp; #Zy-X_r
} else { DG $._
data[k] = temp[j--]; d^<a)>5h
b = temp[j]; 4?a!6
} 2!^[x~t
} `X7ns?
} M1f^Lx
StuDtY
/** \PB~6
* @param data 044*@a5f
* @param l [ZP8[Zl'?
* @param i +=bGrn>h
*/ fjAJys)Q
private void insertSort(int[] data, int start, int len) { Oy!j`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HLy}ta\
} (gl/NH!
} @BZ6{@*
} Q`]El<$
} "jUr[X2J
vZns,K#4H\
堆排序： U-#t&yjh#
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package org.rut.util.algorithm.support; Bjz\L0d
s2@}01QPo
import org.rut.util.algorithm.SortUtil; _~`\TS8
]<;m;/H
/** Svmyg]
* @author treeroot S)0bu(a`Z,
* @since 2006-2-2 t;@VsQ8
* @version 1.0 Pb|'f(
*/ LyB$~wZx~@
public class HeapSort implements SortUtil.Sort{ EMe6Z!k
a9q68
/* (non-Javadoc) wOy1i/oj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y^gazr"
*/ Upr:sB
public void sort(int[] data) { 61Nj&1Ze
MaxHeap h=new MaxHeap(); $e|G#mMd-
h.init(data); w\'Zcw,d
for(int i=0;i h.remove(); rZy38Wo
System.arraycopy(h.queue,1,data,0,data.length); *My?l75
} 3d.JV'C'c
C'hI{4@P
private static class MaxHeap{ _|ucC$*
WRJ+l_81
void init(int[] data){ .d5|Fs~B
this.queue=new int[data.length+1]; 9_rNJLj8y
for(int i=0;i queue[++size]=data; pQxaT$
fixUp(size); .6[xX?i^T
} =>hq0F4[;
} WG;1[o&
?'K}bmdt}.
private int size=0; 0C}7=_?
MO:##C
private int[] queue; QK\QvU2y
}B_n}<tjD
public int get() { ~$f+]7
return queue[1]; (9BjZ&ej
} ?J+[|*'yK
~u&3Ki*x
public void remove() { 0*%j6*XDq9
SortUtil.swap(queue,1,size--); ?kew[oZ
fixDown(1); 6-#f1D 6
} qoMYiF}/e
file://fixdown DFs J}` $
private void fixDown(int k) { uKqN
int j; B:tST(
while ((j = k << 1) <= size) { IC9:&C[
if (j < size %26amp;%26amp; queue[j] j++; B7TA:K
if (queue[k]>queue[j]) file://不用交换 2C%{A
break; ' %OQd?MhL
SortUtil.swap(queue,j,k); }VE[W
k = j; O!zH5
} e+=Ojo#
} kRskeMr:Rd
private void fixUp(int k) { qqSk*oH~
while (k > 1) { T IPb ]
int j = k >> 1; uG3t%CmN
if (queue[j]>queue[k]) A0M)*9 f
break; g!7/iKj:
SortUtil.swap(queue,j,k); DT(A~U<y
k = j; v|jBRKU99
} E`>-+~ZUsk
} 9p(s FQ [
SPL72+S`,
} 6Pl$DSu
T"t3e=xA
} +J$[RxQ#
d> Y9g
SortUtil： au574tj
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package org.rut.util.algorithm; >i]r,j8!
!:`QX\Ux
import org.rut.util.algorithm.support.BubbleSort; B{QY-F~
import org.rut.util.algorithm.support.HeapSort; E/LR(d_
import org.rut.util.algorithm.support.ImprovedMergeSort; 1bd(JL
import org.rut.util.algorithm.support.ImprovedQuickSort; ro6peUL*2`
import org.rut.util.algorithm.support.InsertSort; uKh),@JV
import org.rut.util.algorithm.support.MergeSort; ]BCH9%zLj
import org.rut.util.algorithm.support.QuickSort; gOO\` #
import org.rut.util.algorithm.support.SelectionSort; .0#?u1gXsX
import org.rut.util.algorithm.support.ShellSort; S8<O$^L^
R{@WlkG}
/** hti)<#f
* @author treeroot "VkraB.i
* @since 2006-2-2 $t-HJ<!
* @version 1.0 .BlGV2@^#
*/ T\b e(@r
public class SortUtil { tp_*U,
public final static int INSERT = 1; ]gkI:scPA
public final static int BUBBLE = 2; h5x FP
public final static int SELECTION = 3; pF#nj`L
public final static int SHELL = 4; =4/lJm``
public final static int QUICK = 5; I9ubVcV8
public final static int IMPROVED_QUICK = 6; 2@1A,
public final static int MERGE = 7; sju. `f>-r
public final static int IMPROVED_MERGE = 8; {k}S!T
public final static int HEAP = 9; <"AP&J'H
J^ryUOo}b
public static void sort(int[] data) { ,S:LhgSP
sort(data, IMPROVED_QUICK); zfO0+fMH
} znFa4
private static String[] name={ MaXgy|yB1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r3/H_Z
}; V;~W,o!
=wPl;SDf!
private static Sort[] impl=new Sort[]{ cW26TtU(
new InsertSort(), D+N{'d?+
new BubbleSort(), lEANNu
new SelectionSort(), >Rjk d>K3
new ShellSort(), O@'/B" &
new QuickSort(), xg/3*rL
new ImprovedQuickSort(), ]gHw;ry
new MergeSort(), %-i2MK'A
new ImprovedMergeSort(), QgC
new HeapSort() ; @-7'%(C
}; 2ME3=C
#)hM]=,e
public static String toString(int algorithm){ \$V~kgQ0
return name[algorithm-1]; z(aei(U=
} y0M^oLx
b(I-0<
public static void sort(int[] data, int algorithm) { :U0z;
impl[algorithm-1].sort(data); eFp4MD8?
} %w=*4!NWb
O]~cv^
public static interface Sort { VW I{ wC
public void sort(int[] data); =\ iV=1iB
} 6^s=25>p
:7<spd(%"
public static void swap(int[] data, int i, int j) { n87B[R
int temp = data; x;99[C!$
data = data[j]; +S5"4<
data[j] = temp; \d2Ku10v[
} ; ob>$ _
} *ELbz}Q