[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; =y-yHRC7
} .SjJG67OyA
int i1=l; F \ls]luN
int i2=mid+1; ]:#=[CH
for(int cur=l;cur<=r;cur++){ r:$tvT*
if(i1==mid+1) \?]U*)B.r
data[cur]=temp[i2++]; "o+?vx-
else if(i2>r) .n1&Jsey
data[cur]=temp[i1++]; g=[OH
else if(temp[i1] data[cur]=temp[i1++]; Cyd/HTNh<
else ]}PXN1(
data[cur]=temp[i2++]; pHmqwB~|
} ;YR/7
} Gn=b_!
NdRcA
} _,!0_\+i
>#$SaG!
改进后的归并排序: Ij7P-5=<
+HBizJ9K
package org.rut.util.algorithm.support; L~-/'+
W]#w4Fp!
import org.rut.util.algorithm.SortUtil; >STthPO
7bk77`qWr
/** uDie205
* @author treeroot uUg;v/:
* @since 2006-2-2 tu<<pR>
* @version 1.0 BW7AjtxQ&
*/ {iX#
public class ImprovedMergeSort implements SortUtil.Sort { ". tW5O>
F$)l8}
private static final int THRESHOLD = 10; 2PYnzAsl
;O% H]oN
/* V\Gs&>
* (non-Javadoc) @JXpD8jn
* O\.^H/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UP^8Yhdo
*/ !{r2`d09n)
public void sort(int[] data) { @Suz-j(H
int[] temp=new int[data.length]; f]8MdYX(
mergeSort(data,temp,0,data.length-1); ?VNtT/
} !nSa4U,$w<
?)|}gr
private void mergeSort(int[] data, int[] temp, int l, int r) { <4LJ#Fx
int i, j, k; z )'9[t
int mid = (l + r) / 2; h40;Q<D
if (l == r) ##6\~!P
return; ,)Q-o2(C
if ((mid - l) >= THRESHOLD) P !i_?M
mergeSort(data, temp, l, mid); ;Y\LsmZ;F
else "G [Nb:,CR
insertSort(data, l, mid - l + 1); @w8}]S
if ((r - mid) > THRESHOLD) w2.] 3QAZ
mergeSort(data, temp, mid + 1, r); .qSDe+A
else M!'d
insertSort(data, mid + 1, r - mid); u:f ]|Q
,fp+nu8,
for (i = l; i <= mid; i++) { UqI #F
temp = data; 7S}0Kuk)
} VkFh(Br<{
for (j = 1; j <= r - mid; j++) { 4%J0e'iN
temp[r - j + 1] = data[j + mid]; ot<d FvD
} p[JIH~nb
int a = temp[l]; AOZ C D{
int b = temp[r]; DLrV{8%W
for (i = l, j = r, k = l; k <= r; k++) { E xhih^[_
if (a < b) { >`0U2K
data[k] = temp[i++]; \W.CHSD
a = temp; zuLW'a6F-
} else { K khuPBd2
data[k] = temp[j--]; rNq*z,
b = temp[j]; KkZx6A)$u
} iSCkV2
} `-uE(qp
} ^wolY0p
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/** aDdGhB
* @param data \Ip)Lm0
* @param l ;stuTj@vH
* @param i Ab ,^y
*/ nZbI}kcm
private void insertSort(int[] data, int start, int len) { Y${'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {!|4JquE_
} 3[[oAp
} DzGUKJh6
} }_'5Vb_
} `[sFh%:
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堆排序： Z6zV 9hn
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package org.rut.util.algorithm.support; \Osu1]Jn>
ZRxOXt&;
import org.rut.util.algorithm.SortUtil; ?$6H',u
U*[E+Uq}:N
/** l1 Kv`v\
* @author treeroot >}V?GK36
* @since 2006-2-2 tVRN3fJH
* @version 1.0 `3F#k[IR
*/ BX?DI-o^h
public class HeapSort implements SortUtil.Sort{ _iJ~O1qx,w
8z1z<\
/* (non-Javadoc) j9NF|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3^UdB9j;
*/ rRq60A
public void sort(int[] data) { P$obID
MaxHeap h=new MaxHeap(); `DY yK?R
h.init(data); N]+6<
for(int i=0;i h.remove(); Q~(Gll;
System.arraycopy(h.queue,1,data,0,data.length); bgorW"'
} r"dIB@
]W5*R07
private static class MaxHeap{ UTkPA2x
LU:xmDv
void init(int[] data){ |'?vlUCd
this.queue=new int[data.length+1]; `NW/Z/_
for(int i=0;i queue[++size]=data; V.*TOU{{xh
fixUp(size); pt<zyH3Z
} &zJI~R
} P1mg;!tq
/]`@.mZ9:
private int size=0; U+!RIF[Je
q}P@}TE
private int[] queue; %l7[eZ{Y
J9mK9{#q
public int get() { <T_3s\
return queue[1]; *C*ZmC5
} n-ffX*zA(
uE's&H
public void remove() { tY)L^.*7
SortUtil.swap(queue,1,size--); kZw"a*6
fixDown(1); +5zXbfO
} gs'M^|e)
file://fixdown -%`~3*L
private void fixDown(int k) { (TT=i
int j; 6|jZv~rS$
while ((j = k << 1) <= size) { ^~H}N$W"-q
if (j < size %26amp;%26amp; queue[j] j++; eg;7BZim{
if (queue[k]>queue[j]) file://不用交换 !vwio!
break; ]UvB+M]Lv)
SortUtil.swap(queue,j,k); !J7`frv"(
k = j; +Ryj82;59z
} ps{4_V-3u
} ;b{#$#`=
private void fixUp(int k) { ]pR?/3
while (k > 1) { arL>{mj
int j = k >> 1; 7H3v[ f^Q
if (queue[j]>queue[k]) ]M5~p^ RB
break; R0-0
SortUtil.swap(queue,j,k); bB_LL
k = j; Jp=qPG|
} ?J:w,,4m
} <[db)r~c
vywB{%p
} ZexC3LD"
s/"bH3Ob9v
} H a!,9{T
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SortUtil： jR/Gd01)
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package org.rut.util.algorithm; wp?:@XM
kd'b_D[$H
import org.rut.util.algorithm.support.BubbleSort; xk,Uf,,>
import org.rut.util.algorithm.support.HeapSort; x4q}xwH
import org.rut.util.algorithm.support.ImprovedMergeSort; v}$Q
import org.rut.util.algorithm.support.ImprovedQuickSort; ]Fy'M
import org.rut.util.algorithm.support.InsertSort; ly%^\jW
import org.rut.util.algorithm.support.MergeSort; |}G"^r
import org.rut.util.algorithm.support.QuickSort; N1'`^ay$
import org.rut.util.algorithm.support.SelectionSort; egq,)6>
import org.rut.util.algorithm.support.ShellSort; w0BphK[
eft=k}
/** |*{*tW C1
* @author treeroot O\=Z;}<N
* @since 2006-2-2 F1yn@a "=J
* @version 1.0 );0
*/ p'h'Cz
public class SortUtil { _5p$#U`
public final static int INSERT = 1; R (f:UC
public final static int BUBBLE = 2; }QI \K
public final static int SELECTION = 3; 8:TX9`,
public final static int SHELL = 4; 7:UeE~uB:
public final static int QUICK = 5; d7V/#34
public final static int IMPROVED_QUICK = 6; s 4`-mIa
public final static int MERGE = 7; lO-DXbgql$
public final static int IMPROVED_MERGE = 8; jW:7PS
public final static int HEAP = 9; :4{ `c.S
E/:U,u{
public static void sort(int[] data) { |#yu
sort(data, IMPROVED_QUICK); if'=W6W
} kORWj<
private static String[] name={ /!Rva"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2|,$#V=
}; nd'D0<%
p.W7>o,[w
private static Sort[] impl=new Sort[]{ NN4Z:6W5
new InsertSort(), P#A,(Bke3
new BubbleSort(), fV"Y/9}(
new SelectionSort(), I1]YT
new ShellSort(), d4b! r
new QuickSort(), 7\UHADr
new ImprovedQuickSort(), $>/d)o
new MergeSort(), H(^Ehv>
new ImprovedMergeSort(), _`?0w#>0
new HeapSort() 1clzDwW
}; \n_7+[=E
='"Yj
public static String toString(int algorithm){ L0![SE>
return name[algorithm-1]; [Hx}#Kds
} !RKuEg4hQ
u#ya 8
public static void sort(int[] data, int algorithm) { gT8(LDJ
impl[algorithm-1].sort(data); )q<VZ|V
} WM+8<|)n
s\d3u`G
public static interface Sort { <f7 O3 >
public void sort(int[] data); .BPd06y
} 0ca0-vY
mlByE,S2E
public static void swap(int[] data, int i, int j) { $oW=N
int temp = data; *B&P[n
data = data[j]; 'dj3y/ k%
data[j] = temp; J`5VE$2M
} (U'n1s/X
} 12^uu)6Xm,