[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; $~EY:
} .GnoK?
int i1=l; xAsy07J?
int i2=mid+1; .<P@6Jq
for(int cur=l;cur<=r;cur++){ esTK4z]
if(i1==mid+1) e?aSM
data[cur]=temp[i2++]; I1ibrn
else if(i2>r) yC}x6xG
data[cur]=temp[i1++]; g2lv4Tiq-
else if(temp[i1] data[cur]=temp[i1++]; B*Q.EKD8s
else a0FU[*q
data[cur]=temp[i2++]; i;)r|L`V?
} +c'I7bBr
} V6<Ki
!OH'pC5
} 5OFb9YX
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改进后的归并排序: D@mqfi(x
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package org.rut.util.algorithm.support; ,"5p=JX`
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import org.rut.util.algorithm.SortUtil; [yAR%]i-7
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/** Z=?qf$.}
* @author treeroot avv/mEf-f
* @since 2006-2-2 /3vj`#jD
* @version 1.0 Bsz;GnD|r
*/ a'@?c_y;$
public class ImprovedMergeSort implements SortUtil.Sort { aG1[85:,\i
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private static final int THRESHOLD = 10; H%c{ }F
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/* TLzcQ|
* (non-Javadoc) m+'X8}GC#O
* XG6UV('
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PDh1*bf{u
*/ Z Q9's
public void sort(int[] data) { )&elr,b/y
int[] temp=new int[data.length]; f1VA61z{)
mergeSort(data,temp,0,data.length-1); 20uR?/|@
} *r3u=oWb
}Sb&ux
private void mergeSort(int[] data, int[] temp, int l, int r) { |}roR{gc|
int i, j, k; M#>f:_`<
int mid = (l + r) / 2; M8lR#2n|
if (l == r) LYiz:cQh
return; Y)4D$9:
if ((mid - l) >= THRESHOLD) ~oBSf+N
mergeSort(data, temp, l, mid); KWV{wW=-
else ?9H.JR2s%
insertSort(data, l, mid - l + 1); ~Urj:l
if ((r - mid) > THRESHOLD) yYTiAvN
mergeSort(data, temp, mid + 1, r); ">RDa<H]
else <$;fOp
insertSort(data, mid + 1, r - mid); 8>jd2'v{
Y-,1&$&
for (i = l; i <= mid; i++) { 0r\hX6 k
temp = data; Ol@ YSkd
} \+w -{"u$
for (j = 1; j <= r - mid; j++) { V/!8q`lYNJ
temp[r - j + 1] = data[j + mid]; aKCXV[PO
} A&0sD}I\K
int a = temp[l]; Uz!cVs?-
int b = temp[r]; 7,"1%^tU
for (i = l, j = r, k = l; k <= r; k++) { xF{<-b
if (a < b) { =M9Od7\J
data[k] = temp[i++]; ~#~Kxh
a = temp; dkf?lmC+M
} else { K`1\3J)
data[k] = temp[j--]; WaWx5Fx+
b = temp[j]; 9X{aU)"omQ
} t UW'E
} }%rz"kB
} P8s'e_t
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/** {4{ACp
* @param data SIRZ_lt$r
* @param l >!YI7)
* @param i #6JCm!s
*/ N1!|nS3w
private void insertSort(int[] data, int start, int len) { A]vQ1*pnk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V9m1n=r
} |v{a5|<E
} r,b-c
} (#.)~poZ
} ;z7iUke0%
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堆排序： nyPA`)5F0
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package org.rut.util.algorithm.support; gGdZ}9
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import org.rut.util.algorithm.SortUtil; Kc\0-3 Z
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/** W"WvkW>-
* @author treeroot )5X7|*LP
* @since 2006-2-2 ?z60b=f8
* @version 1.0 ^IM;D)X&:
*/ 4S.%y7d\
public class HeapSort implements SortUtil.Sort{ NzRL(A6V
A\.M/)Qo
/* (non-Javadoc) v1zJr6ra9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (85F1"Jp
*/ J74nAC%J^
public void sort(int[] data) { crC];LMl/
MaxHeap h=new MaxHeap(); ZWVcCa3
h.init(data); /gHRJ$2|Sx
for(int i=0;i h.remove(); Hj;j\R >2
System.arraycopy(h.queue,1,data,0,data.length); w>rglm&
} f.'o4HSj
./ib{ @A.
private static class MaxHeap{ ^QV;[ha,o
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void init(int[] data){ W?/7PVGv5h
this.queue=new int[data.length+1]; K)0 6][,
for(int i=0;i queue[++size]=data; jvm "7)h
fixUp(size); ipKkz
} -i @!{ ?
} W?R$+~G
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private int size=0; P[ KJuc
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private int[] queue; } ho8d+A
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public int get() { *RM#F!A
return queue[1]; K|Yr
} m&|?mTo>m
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public void remove() { Ctt{j'-[
SortUtil.swap(queue,1,size--); ?^IM2}(p
fixDown(1); g[@]OsX
} hlkf|H
file://fixdown E9226
private void fixDown(int k) { .Fh5:WN
int j; 35jP</
while ((j = k << 1) <= size) { sOLo[5y'
if (j < size %26amp;%26amp; queue[j] j++; F/RV{} 17E
if (queue[k]>queue[j]) file://不用交换 }(TZ}* d
break; o&LNtl;
SortUtil.swap(queue,j,k); -F|(Y1OE
k = j; 9[6*FAFJPP
} rxCuV
} ^X0<ZI
private void fixUp(int k) { lcIX l&
while (k > 1) { 59T:{d;~
int j = k >> 1; S]{K^Q),
if (queue[j]>queue[k]) 18ci-W#p
break; uu=e~K
SortUtil.swap(queue,j,k); |n67!1
k = j; AytHnp\H
} Z^`>;n2
} G*Z4~-E4*
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} |yN7#O-D
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} jr@<-.
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SortUtil： tq>QZEg
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package org.rut.util.algorithm; m[ txKj.=_
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import org.rut.util.algorithm.support.BubbleSort; qz(0iZ]Y
import org.rut.util.algorithm.support.HeapSort; Ge[N5N>
import org.rut.util.algorithm.support.ImprovedMergeSort; S4`uNB#Ht
import org.rut.util.algorithm.support.ImprovedQuickSort; q^goi1
import org.rut.util.algorithm.support.InsertSort; ; >.>vLF
import org.rut.util.algorithm.support.MergeSort; P",~8Aci(
import org.rut.util.algorithm.support.QuickSort; M.!U;U<?
import org.rut.util.algorithm.support.SelectionSort; kY4riZnm
import org.rut.util.algorithm.support.ShellSort; kV6T#RVob
*]O[ZjyOY
/** t~ Q{\!
* @author treeroot Cq/*/jBM
* @since 2006-2-2 0rA&_K[#-<
* @version 1.0 s'fHhG6
*/ QSEf
public class SortUtil { 1|n,s-
public final static int INSERT = 1; cq %=DZ
public final static int BUBBLE = 2; -~v;'zOO
public final static int SELECTION = 3; AVi w}Y J
public final static int SHELL = 4; EQz`o+
public final static int QUICK = 5; &kRkOjuk
public final static int IMPROVED_QUICK = 6; +`_%U7p(
public final static int MERGE = 7; O^4:4tRpt
public final static int IMPROVED_MERGE = 8; Z]":xl\7
public final static int HEAP = 9; y$#mk3(e~t
HDA!;&NRS
public static void sort(int[] data) { I6'U[)%
sort(data, IMPROVED_QUICK); gn#4az3@e>
} ;&^S-+
private static String[] name={ ix$?/GlL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" # TC x8]F
}; do7 [Nj
&D>e>]E|P
private static Sort[] impl=new Sort[]{ 6 }qNH29
new InsertSort(), )DfmO
new BubbleSort(), N 0&h5
new SelectionSort(), Yep(,J~'
new ShellSort(), lySeq^y?Q
new QuickSort(), b 9F=}.4
new ImprovedQuickSort(), .z7F58
new MergeSort(), >j_,3{eJ
new ImprovedMergeSort(), TR5"K{WDx
new HeapSort() 4=>/x90y
}; GmPNzHDb
+KrV!Taf
public static String toString(int algorithm){ rM<c;iQ
return name[algorithm-1]; S;a{wYF6v
} \O^b|0zc
D%Hz'G0|
public static void sort(int[] data, int algorithm) { -?&wD["y
impl[algorithm-1].sort(data); UP 75}h9
} 73rr"> 9#0
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public static interface Sort { ke2'?,f
public void sort(int[] data); {1>V~e8t
} `\(Fax
7?qRY9Qu
public static void swap(int[] data, int i, int j) { uf^"Y3
int temp = data; 8BhLO.(<O
data = data[j]; ;Q:^|Fw!F
data[j] = temp; h~urZXD<
} aYkm]w;C
} }rxFX